Tag 4.1.9

Built from https://develop.svn.wordpress.org/tags/4.1.9@36209 git-svn-id: http://core.svn.wordpress.org/tags/4.1.9@36176 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-01-06 23:34:08 +00:00
58 changed files with 1351 additions and 2871 deletions
--- a/license.txt
+++ b/license.txt
@@ -1,6 +1,6 @@
 WordPress - Web publishing software

-Copyright 2018 by the contributors
+Copyright 2015 by the contributors

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
--- a/readme.html
+++ b/readme.html
@@ -9,6 +9,7 @@
 <body>
 <h1 id="logo">
 	<a href="https://wordpress.org/"><img alt="WordPress" src="wp-admin/images/wordpress-logo.png" /></a>
+	<br /> Version 4.1.9
 </h1>
 <p style="text-align: center">Semantic Personal Publishing Platform</p>

--- a/wp-admin/about.php
+++ b/wp-admin/about.php
@@ -42,64 +42,7 @@ include( ABSPATH . 'wp-admin/admin-header.php' );
 </h2>

 <div class="changelog point-releases">
-	<h3><?php echo _n( 'Maintenance and Security Release', 'Maintenance and Security Releases', 24 ); ?></h3>
-	<p><?php printf( __( '<strong>Version %s</strong> addressed one security issue.' ), '4.1.24' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.24' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-			'<strong>Version %1$s</strong> addressed some security issues.', 2 ), '4.1.23' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.23' ); ?>
-	</p>
-	<p><?php printf( __( '<strong>Version %s</strong> addressed one security issue.' ), '4.1.22' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.22' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-			'<strong>Version %1$s</strong> addressed some security issues.', 4 ), '4.1.21' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.21' ); ?>
-	</p>
-	<p><?php printf( __( '<strong>Version %s</strong> addressed one security issue.' ), '4.1.20' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.20' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-			'<strong>Version %1$s</strong> addressed some security issues.', 8 ), '4.1.19' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.19' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-			'<strong>Version %1$s</strong> addressed some security issues.', 5 ), '4.1.18' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.18' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed %2$s bug.',
-			'<strong>Version %1$s</strong> addressed %2$s bugs.', 1 ), '4.1.17', number_format_i18n( 1 ) ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.17' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-			'<strong>Version %1$s</strong> addressed some security issues.', 5 ), '4.1.16' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.16' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-			'<strong>Version %1$s</strong> addressed some security issues.', 3 ), '4.1.15' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.15' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-			'<strong>Version %1$s</strong> addressed some security issues.', 8 ), '4.1.14' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.14' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-         '<strong>Version %1$s</strong> addressed some security issues.', 2 ), '4.1.13' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.13' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-         '<strong>Version %1$s</strong> addressed some security issues.', 9 ), '4.1.12' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.12' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-         '<strong>Version %1$s</strong> addressed some security issues.', 6 ), '4.1.11' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.11' ); ?>
- 	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-         '<strong>Version %1$s</strong> addressed some security issues.', 2 ), '4.1.10' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.10' ); ?>
- 	</p>
+	<h3><?php echo _n( 'Maintenance and Security Release', 'Maintenance and Security Releases', 9 ); ?></h3>
 	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
         '<strong>Version %1$s</strong> addressed some security issues.', 1 ), '4.1.9' ); ?>
 		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.1.9' ); ?>
@@ -223,7 +166,7 @@ include( ABSPATH . 'wp-admin/admin-header.php' );
 <hr />

 <div class="changelog feature-list">
-	<h2><?php _e( 'Under the Hood' ); ?></h2>
+	<h2><?php _e( 'Under the Hood' ); ?></h3>

 	<div class="feature-section col two-col">
 		<div>
--- a/wp-admin/customize.php
+++ b/wp-admin/customize.php
@@ -18,11 +18,9 @@ if ( ! current_user_can( 'customize' ) ) {

 wp_reset_vars( array( 'url', 'return' ) );
 $url = wp_unslash( $url );
-$url = esc_url_raw( $url );
 $url = wp_validate_redirect( $url, home_url( '/' ) );
 if ( $return ) {
 	$return = wp_unslash( $return );
-	$return = esc_url_raw( $return );
 	$return = wp_validate_redirect( $return );
 }
 if ( ! $return ) {
@@ -149,7 +147,7 @@ do_action( 'customize_controls_print_scripts' );
 							echo sprintf( __( 'You are previewing %s' ), '<strong class="theme-name">' . $wp_customize->theme()->display('Name') . '</strong>' );
 						} else {
 							/* translators: %s is the site/panel title in the Customize pane */
-							echo sprintf( __( 'You are customizing %s' ), '<strong class="theme-name site-title">' . get_bloginfo( 'name', 'display' ) . '</strong>' );
+							echo sprintf( __( 'You are customizing %s' ), '<strong class="theme-name site-title">' . get_bloginfo( 'name' ) . '</strong>' );
 						}
 					?></span>
 				</div>
--- a/wp-admin/includes/ajax-actions.php
+++ b/wp-admin/includes/ajax-actions.php
@@ -2575,7 +2575,7 @@ function wp_ajax_get_revision_diffs() {
 	if ( ! $post = get_post( (int) $_REQUEST['post_id'] ) )
 		wp_send_json_error();

-	if ( ! current_user_can( 'edit_post', $post->ID ) )
+	if ( ! current_user_can( 'read_post', $post->ID ) )
 		wp_send_json_error();

 	// Really just pre-loading the cache here.
--- a/wp-admin/includes/class-wp-plugins-list-table.php
+++ b/wp-admin/includes/class-wp-plugins-list-table.php
@@ -425,27 +425,27 @@ class WP_Plugins_List_Table extends WP_List_Table {
 			if ( $screen->in_admin( 'network' ) ) {
 				if ( $is_active ) {
 					if ( current_user_can( 'manage_network_plugins' ) )
-						$actions['deactivate'] = '<a href="' . wp_nonce_url('plugins.php?action=deactivate&amp;plugin=' . urlencode( $plugin_file ) . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'deactivate-plugin_' . $plugin_file) . '" title="' . esc_attr__('Deactivate this plugin') . '">' . __('Network Deactivate') . '</a>';
+						$actions['deactivate'] = '<a href="' . wp_nonce_url('plugins.php?action=deactivate&amp;plugin=' . $plugin_file . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'deactivate-plugin_' . $plugin_file) . '" title="' . esc_attr__('Deactivate this plugin') . '">' . __('Network Deactivate') . '</a>';
 				} else {
 					if ( current_user_can( 'manage_network_plugins' ) )
-						$actions['activate'] = '<a href="' . wp_nonce_url('plugins.php?action=activate&amp;plugin=' . urlencode( $plugin_file ) . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'activate-plugin_' . $plugin_file) . '" title="' . esc_attr__('Activate this plugin for all sites in this network') . '" class="edit">' . __('Network Activate') . '</a>';
+						$actions['activate'] = '<a href="' . wp_nonce_url('plugins.php?action=activate&amp;plugin=' . $plugin_file . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'activate-plugin_' . $plugin_file) . '" title="' . esc_attr__('Activate this plugin for all sites in this network') . '" class="edit">' . __('Network Activate') . '</a>';
 					if ( current_user_can( 'delete_plugins' ) && ! is_plugin_active( $plugin_file ) )
-						$actions['delete'] = '<a href="' . wp_nonce_url('plugins.php?action=delete-selected&amp;checked[]=' . urlencode( $plugin_file ) . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'bulk-plugins') . '" title="' . esc_attr__('Delete this plugin') . '" class="delete">' . __('Delete') . '</a>';
+						$actions['delete'] = '<a href="' . wp_nonce_url('plugins.php?action=delete-selected&amp;checked[]=' . $plugin_file . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'bulk-plugins') . '" title="' . esc_attr__('Delete this plugin') . '" class="delete">' . __('Delete') . '</a>';
 				}
 			} else {
 				if ( $is_active ) {
-					$actions['deactivate'] = '<a href="' . wp_nonce_url('plugins.php?action=deactivate&amp;plugin=' . urlencode( $plugin_file ) . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'deactivate-plugin_' . $plugin_file) . '" title="' . esc_attr__('Deactivate this plugin') . '">' . __('Deactivate') . '</a>';
+					$actions['deactivate'] = '<a href="' . wp_nonce_url('plugins.php?action=deactivate&amp;plugin=' . $plugin_file . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'deactivate-plugin_' . $plugin_file) . '" title="' . esc_attr__('Deactivate this plugin') . '">' . __('Deactivate') . '</a>';
 				} else {
-					$actions['activate'] = '<a href="' . wp_nonce_url('plugins.php?action=activate&amp;plugin=' . urlencode( $plugin_file ) . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'activate-plugin_' . $plugin_file) . '" title="' . esc_attr__('Activate this plugin') . '" class="edit">' . __('Activate') . '</a>';
+					$actions['activate'] = '<a href="' . wp_nonce_url('plugins.php?action=activate&amp;plugin=' . $plugin_file . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'activate-plugin_' . $plugin_file) . '" title="' . esc_attr__('Activate this plugin') . '" class="edit">' . __('Activate') . '</a>';

 					if ( ! is_multisite() && current_user_can('delete_plugins') )
-						$actions['delete'] = '<a href="' . wp_nonce_url('plugins.php?action=delete-selected&amp;checked[]=' . urlencode( $plugin_file ) . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'bulk-plugins') . '" title="' . esc_attr__('Delete this plugin') . '" class="delete">' . __('Delete') . '</a>';
+						$actions['delete'] = '<a href="' . wp_nonce_url('plugins.php?action=delete-selected&amp;checked[]=' . $plugin_file . '&amp;plugin_status=' . $context . '&amp;paged=' . $page . '&amp;s=' . $s, 'bulk-plugins') . '" title="' . esc_attr__('Delete this plugin') . '" class="delete">' . __('Delete') . '</a>';
 				} // end if $is_active

 			 } // end if $screen->in_admin( 'network' )

 			if ( ( ! is_multisite() || $screen->in_admin( 'network' ) ) && current_user_can('edit_plugins') && is_writable(WP_PLUGIN_DIR . '/' . $plugin_file) )
-				$actions['edit'] = '<a href="plugin-editor.php?file=' . urlencode( $plugin_file ) . '" title="' . esc_attr__('Open this file in the Plugin Editor') . '" class="edit">' . __('Edit') . '</a>';
+				$actions['edit'] = '<a href="plugin-editor.php?file=' . $plugin_file . '" title="' . esc_attr__('Open this file in the Plugin Editor') . '" class="edit">' . __('Edit') . '</a>';
 		} // end if $context

 		$prefix = $screen->in_admin( 'network' ) ? 'network_admin_' : '';
--- a/wp-admin/includes/class-wp-posts-list-table.php
+++ b/wp-admin/includes/class-wp-posts-list-table.php
@@ -691,9 +691,8 @@ class WP_Posts_List_Table extends WP_List_Table {
 					echo '<div class="locked-info"><span class="locked-avatar">' . $locked_avatar . '</span> <span class="locked-text">' . $locked_text . "</span></div>\n";
 				}

-				if ( ! $this->hierarchical_display && 'excerpt' == $mode && current_user_can( 'read_post', $post->ID ) ) {
-						echo esc_html( get_the_excerpt() );
-				}
+				if ( ! $this->hierarchical_display && 'excerpt' == $mode && current_user_can( 'read_post', $post->ID ) )
+						the_excerpt();

 				$actions = array();
 				if ( $can_edit_post && 'trash' != $post->post_status ) {
--- a/wp-admin/includes/class-wp-upgrader.php
+++ b/wp-admin/includes/class-wp-upgrader.php
@@ -2326,12 +2326,8 @@ class File_Upload_Upgrader {
 			if ( ! ( ( $uploads = wp_upload_dir() ) && false === $uploads['error'] ) )
 				wp_die( $uploads['error'] );

-			$this->filename = sanitize_file_name( $_GET[ $urlholder ] );
+			$this->filename = $_GET[$urlholder];
 			$this->package = $uploads['basedir'] . '/' . $this->filename;
-
-			if ( 0 !== strpos( realpath( $this->package ), realpath( $uploads['basedir'] ) ) ) {
-				wp_die( __( 'Please select a file' ) );
-			}
 		}
 	}

--- a/wp-admin/includes/file.php
+++ b/wp-admin/includes/file.php
@@ -591,10 +591,6 @@ function _unzip_file_ziparchive($file, $to, $needed_dirs = array() ) {
 		if ( '__MACOSX/' === substr($info['name'], 0, 9) ) // Skip the OS X-created __MACOSX directory
 			continue;

-		if ( 0 !== validate_file( $info['name'] ) ) {
-			return new WP_Error( 'invalid_file_ziparchive', __( 'Could not extract file from archive.' ), $info['name'] );
-		}
-
 		$uncompressed_size += $info['size'];

 		if ( '/' == substr($info['name'], -1) ) // directory
@@ -748,10 +744,6 @@ function _unzip_file_pclzip($file, $to, $needed_dirs = array()) {
 		if ( '__MACOSX/' === substr($file['filename'], 0, 9) ) // Don't extract the OS X-created __MACOSX directory files
 			continue;

-		if ( 0 !== validate_file( $file['filename'] ) ) {
-			return new WP_Error( 'invalid_file_pclzip', __( 'Could not extract file from archive.' ), $file['filename'] );
-		}
-
 		if ( ! $wp_filesystem->put_contents( $to . $file['filename'], $file['content'], FS_CHMOD_FILE) )
 			return new WP_Error( 'copy_failed_pclzip', __( 'Could not copy file.' ), $file['filename'] );
 	}
@@ -1026,28 +1018,14 @@ function request_filesystem_credentials($form_post, $type = '', $error = false,

 	$credentials = get_option('ftp_credentials', array( 'hostname' => '', 'username' => ''));

-	$submitted_form = wp_unslash( $_POST );
-
-	// Verify nonce, or unset submitted form field values on failure
-	if ( ! isset( $_POST['_fs_nonce'] ) || ! wp_verify_nonce( $_POST['_fs_nonce'], 'filesystem-credentials' ) ) {
-		unset(
-			$submitted_form['hostname'],
-			$submitted_form['username'],
-			$submitted_form['password'],
-			$submitted_form['public_key'],
-			$submitted_form['private_key'],
-			$submitted_form['connection_type']
-		);
-	}
-
 	// If defined, set it to that, Else, If POST'd, set it to that, If not, Set it to whatever it previously was(saved details in option)
-	$credentials['hostname'] = defined('FTP_HOST') ? FTP_HOST : (!empty($submitted_form['hostname']) ? $submitted_form['hostname'] : $credentials['hostname']);
-	$credentials['username'] = defined('FTP_USER') ? FTP_USER : (!empty($submitted_form['username']) ? $submitted_form['username'] : $credentials['username']);
-	$credentials['password'] = defined('FTP_PASS') ? FTP_PASS : (!empty($submitted_form['password']) ? $submitted_form['password'] : '');
+	$credentials['hostname'] = defined('FTP_HOST') ? FTP_HOST : (!empty($_POST['hostname']) ? wp_unslash( $_POST['hostname'] ) : $credentials['hostname']);
+	$credentials['username'] = defined('FTP_USER') ? FTP_USER : (!empty($_POST['username']) ? wp_unslash( $_POST['username'] ) : $credentials['username']);
+	$credentials['password'] = defined('FTP_PASS') ? FTP_PASS : (!empty($_POST['password']) ? wp_unslash( $_POST['password'] ) : '');

 	// Check to see if we are setting the public/private keys for ssh
-	$credentials['public_key'] = defined('FTP_PUBKEY') ? FTP_PUBKEY : (!empty($submitted_form['public_key']) ? $submitted_form['public_key'] : '');
-	$credentials['private_key'] = defined('FTP_PRIKEY') ? FTP_PRIKEY : (!empty($submitted_form['private_key']) ? $submitted_form['private_key'] : '');
+	$credentials['public_key'] = defined('FTP_PUBKEY') ? FTP_PUBKEY : (!empty($_POST['public_key']) ? wp_unslash( $_POST['public_key'] ) : '');
+	$credentials['private_key'] = defined('FTP_PRIKEY') ? FTP_PRIKEY : (!empty($_POST['private_key']) ? wp_unslash( $_POST['private_key'] ) : '');

 	// Sanitize the hostname, Some people might pass in odd-data:
 	$credentials['hostname'] = preg_replace('|\w+://|', '', $credentials['hostname']); //Strip any schemes off
@@ -1064,8 +1042,8 @@ function request_filesystem_credentials($form_post, $type = '', $error = false,
 		$credentials['connection_type'] = 'ssh';
 	else if ( (defined('FTP_SSL') && FTP_SSL) && 'ftpext' == $type ) //Only the FTP Extension understands SSL
 		$credentials['connection_type'] = 'ftps';
-	else if ( !empty($submitted_form['connection_type']) )
-		$credentials['connection_type'] = $submitted_form['connection_type'];
+	else if ( !empty($_POST['connection_type']) )
+		$credentials['connection_type'] = wp_unslash( $_POST['connection_type'] );
 	else if ( !isset($credentials['connection_type']) ) //All else fails (And it's not defaulted to something else saved), Default to FTP
 		$credentials['connection_type'] = 'ftp';

@@ -1205,14 +1183,11 @@ jQuery(function($){

 <?php
 foreach ( (array) $extra_fields as $field ) {
-	if ( isset( $submitted_form[ $field ] ) )
-		echo '<input type="hidden" name="' . esc_attr( $field ) . '" value="' . esc_attr( $submitted_form[ $field ] ) . '" />';
+	if ( isset( $_POST[ $field ] ) )
+		echo '<input type="hidden" name="' . esc_attr( $field ) . '" value="' . esc_attr( wp_unslash( $_POST[ $field ] ) ) . '" />';
 }
+submit_button( __( 'Proceed' ), 'button', 'upgrade' );
 ?>
-	<p class="request-filesystem-credentials-action-buttons">
-		<?php wp_nonce_field( 'filesystem-credentials', '_fs_nonce', false, true ); ?>
-		<?php submit_button( __( 'Proceed' ), 'button', 'upgrade', false ); ?>
-	</p>
 </div>
 </form>
 <?php
--- a/wp-admin/includes/media.php
+++ b/wp-admin/includes/media.php
@@ -279,7 +279,7 @@ function media_handle_upload($file_id, $post_id, $post_data = array(), $override
 	$url = $file['url'];
 	$type = $file['type'];
 	$file = $file['file'];
-	$title = sanitize_text_field( $name );
+	$title = $name;
 	$content = '';

 	if ( preg_match( '#^audio#', $type ) ) {
@@ -2893,7 +2893,7 @@ function wp_add_id3_tag_data( &$metadata, $data ) {
 		if ( ! empty( $data[$version]['comments'] ) ) {
 			foreach ( $data[$version]['comments'] as $key => $list ) {
 				if ( 'length' !== $key && ! empty( $list ) ) {
-					$metadata[$key] = wp_kses_post( reset( $list ) );
+					$metadata[$key] = reset( $list );
 					// Fix bug in byte stream analysis.
 					if ( 'terms_of_use' === $key && 0 === strpos( $metadata[$key], 'yright notice.' ) )
 						$metadata[$key] = 'Cop' . $metadata[$key];
--- a/wp-admin/includes/post.php
+++ b/wp-admin/includes/post.php
@@ -165,13 +165,6 @@ function _wp_translate_postdata( $update = false, $post_data = null ) {
 		$post_data['post_date_gmt'] = get_gmt_from_date( $post_data['post_date'] );
 	}

-	if ( isset( $post_data['post_category'] ) ) {
-		$category_object = get_taxonomy( 'category' );
-		if ( ! current_user_can( $category_object->cap->assign_terms ) ) {
-			unset( $post_data['post_category'] );
-		}
-	}
-
 	return $post_data;
 }

@@ -1216,7 +1209,7 @@ function get_sample_permalink_html( $id, $new_title = null, $new_slug = null ) {
 	}

 	if ( false === strpos( $permalink, '%postname%' ) && false === strpos( $permalink, '%pagename%' ) ) {
-		$return = '<strong>' . __('Permalink:') . "</strong>\n" . '<span id="sample-permalink" tabindex="-1">' . esc_html( $permalink ) . "</span>\n";
+		$return = '<strong>' . __('Permalink:') . "</strong>\n" . '<span id="sample-permalink" tabindex="-1">' . $permalink . "</span>\n";
 		if ( '' == get_option( 'permalink_structure' ) && current_user_can( 'manage_options' ) && !( 'page' == get_option('show_on_front') && $id == get_option('page_on_front') ) ) {
 			$return .= '<span id="change-permalinks"><a href="options-permalink.php" class="button button-small" target="_blank">' . __('Change Permalinks') . "</a></span>\n";
 		}
@@ -1235,14 +1228,14 @@ function get_sample_permalink_html( $id, $new_title = null, $new_slug = null ) {
 			}
 		}

-		$post_name_html = '<span id="editable-post-name" title="' . $title . '">' . esc_html( $post_name_abridged ) . '</span>';
-		$display_link = str_replace( array( '%pagename%', '%postname%' ), $post_name_html, esc_html( urldecode( $permalink ) ) );
+		$post_name_html = '<span id="editable-post-name" title="' . $title . '">' . $post_name_abridged . '</span>';
+		$display_link = str_replace( array( '%pagename%', '%postname%' ), $post_name_html, urldecode( $permalink ) );

 		$return =  '<strong>' . __( 'Permalink:' ) . "</strong>\n";
 		$return .= '<span id="sample-permalink" tabindex="-1">' . $display_link . "</span>\n";
 		$return .= '&lrm;'; // Fix bi-directional text display defect in RTL languages.
 		$return .= '<span id="edit-slug-buttons"><a href="#post_name" class="edit-slug button button-small hide-if-no-js" onclick="editPermalink(' . $id . '); return false;">' . __( 'Edit' ) . "</a></span>\n";
-		$return .= '<span id="editable-post-name-full">' . esc_html( $post_name ) . "</span>\n";
+		$return .= '<span id="editable-post-name-full">' . $post_name . "</span>\n";
 	}

 	if ( isset( $view_post ) ) {
@@ -1252,7 +1245,7 @@ function get_sample_permalink_html( $id, $new_title = null, $new_slug = null ) {
 			$preview_link = apply_filters( 'preview_post_link', add_query_arg( 'preview', 'true', $preview_link ), $post );
 			$return .= "<span id='view-post-btn'><a href='" . esc_url( $preview_link ) . "' class='button button-small' target='wp-preview-{$post->ID}'>$view_post</a></span>\n";
 		} else {
-			$return .= "<span id='view-post-btn'><a href='" . esc_url( get_permalink( $post ) ) . "' class='button button-small'>$view_post</a></span>\n";
+			$return .= "<span id='view-post-btn'><a href='" . get_permalink( $post ) . "' class='button button-small'>$view_post</a></span>\n";
 		}
 	}

--- a/wp-admin/includes/screen.php
+++ b/wp-admin/includes/screen.php
@@ -970,8 +970,7 @@ final class WP_Screen {

 		switch ( $this->base ) {
 			case 'widgets':
-				$nonce = wp_create_nonce( 'widgets-access' );
-				$this->_screen_settings = '<p><a id="access-on" href="widgets.php?widgets-access=on&_wpnonce=' . urlencode( $nonce ) . '">' . __('Enable accessibility mode') . '</a><a id="access-off" href="widgets.php?widgets-access=off&_wpnonce=' . urlencode( $nonce ) . '">' . __('Disable accessibility mode') . "</a></p>\n";
+				$this->_screen_settings = '<p><a id="access-on" href="widgets.php?widgets-access=on">' . __('Enable accessibility mode') . '</a><a id="access-off" href="widgets.php?widgets-access=off">' . __('Disable accessibility mode') . "</a></p>\n";
 				break;
 			case 'post' :
 				$expand = '<div class="editor-expand hidden"><label for="editor-expand-toggle">';
--- a/wp-admin/includes/template.php
+++ b/wp-admin/includes/template.php
@@ -800,7 +800,7 @@ function page_template_dropdown( $default = '' ) {
 	ksort( $templates );
 	foreach ( array_keys( $templates ) as $template ) {
 		$selected = selected( $default, $templates[ $template ], false );
-		echo "\n\t<option value='" . esc_attr( $templates[ $template ] ) . "' $selected>" . esc_html( $template ) . "</option>";
+		echo "\n\t<option value='" . $templates[ $template ] . "' $selected>$template</option>";
 	}
 }

--- a/wp-admin/includes/update-core.php
+++ b/wp-admin/includes/update-core.php
@@ -695,9 +695,6 @@ $_old_files = array(
 'wp-includes/js/jquery/ui/jquery.ui.tooltip.min.js',
 'wp-includes/js/jquery/ui/jquery.ui.widget.min.js',
 'wp-includes/js/tinymce/skins/wordpress/images/dashicon-no-alt.png',
-// 4.9.2
-'wp-includes/js/mediaelement/flashmediaelement.swf',
-'wp-includes/js/mediaelement/silverlightmediaelement.xap',
 );

 /**
@@ -1048,11 +1045,7 @@ function update_core($from, $to) {
 		$old_file = $to . $old_file;
 		if ( !$wp_filesystem->exists($old_file) )
 			continue;
-
-		// If the file isn't deleted, try writing an empty string to the file instead.
-		if ( ! $wp_filesystem->delete( $old_file, true ) && $wp_filesystem->is_file( $old_file ) ) {
-			$wp_filesystem->put_contents( $old_file, '' );
-		}
+		$wp_filesystem->delete($old_file, true);
 	}

 	// Remove any Genericons example.html's from the filesystem
--- a/wp-admin/js/customize-controls.js
+++ b/wp-admin/js/customize-controls.js
@@ -2003,16 +2003,6 @@
 			}
 		});

-		// Ensure preview nonce is included with every customized request, to allow post data to be read.
-		$.ajaxPrefilter( function injectPreviewNonce( options ) {
-			if ( ! /wp_customize=on/.test( options.data ) ) {
-				return;
-			}
-			options.data += '&' + $.param({
-				customize_preview_nonce: api.settings.nonce.preview
-			});
-		});
-
 		// Refresh the nonces if the preview sends updated nonces over.
 		api.previewer.bind( 'nonce', function( nonce ) {
 			$.extend( this.nonce, nonce );
--- a/wp-admin/js/customize-controls.min.js
+++ b/wp-admin/js/customize-controls.min.js
--- a/wp-admin/network/settings.php
+++ b/wp-admin/network/settings.php
@@ -272,7 +272,7 @@ if ( isset( $_GET['updated'] ) ) {
 			<tr>
 				<th scope="row"><label for="first_comment_author"><?php _e( 'First Comment Author' ) ?></label></th>
 				<td>
-					<input type="text" size="40" name="first_comment_author" id="first_comment_author" value="<?php echo esc_attr( get_site_option('first_comment_author') ); ?>" />
+					<input type="text" size="40" name="first_comment_author" id="first_comment_author" value="<?php echo get_site_option('first_comment_author') ?>" />
 					<p class="description">
 						<?php _e( 'The author of the first comment on a new site.' ) ?>
 					</p>
--- a/wp-admin/plugin-editor.php
+++ b/wp-admin/plugin-editor.php
@@ -93,9 +93,9 @@ default:
 			wp_die( $error );

 		if ( ( ! empty( $_GET['networkwide'] ) && ! is_plugin_active_for_network($file) ) || ! is_plugin_active($file) )
-			activate_plugin($file, "plugin-editor.php?file=" . urlencode( $file ) . "&phperror=1", ! empty( $_GET['networkwide'] ) ); // we'll override this later if the plugin can be included without fatal error
+			activate_plugin($file, "plugin-editor.php?file=$file&phperror=1", ! empty( $_GET['networkwide'] ) ); // we'll override this later if the plugin can be included without fatal error

-		wp_redirect( self_admin_url("plugin-editor.php?file=" . urlencode( $file ) . "&a=te&scrollto=$scrollto") );
+		wp_redirect( self_admin_url("plugin-editor.php?file=$file&a=te&scrollto=$scrollto") );
 		exit;
 	}

@@ -181,14 +181,14 @@ default:
 <big><?php
 	if ( is_plugin_active($plugin) ) {
 		if ( is_writeable($real_file) )
-			echo sprintf(__('Editing <strong>%s</strong> (active)'), esc_html( $file ) );
+			echo sprintf(__('Editing <strong>%s</strong> (active)'), $file);
 		else
-			echo sprintf(__('Browsing <strong>%s</strong> (active)'), esc_html( $file ) );
+			echo sprintf(__('Browsing <strong>%s</strong> (active)'), $file);
 	} else {
 		if ( is_writeable($real_file) )
-			echo sprintf(__('Editing <strong>%s</strong> (inactive)'), esc_html( $file ) );
+			echo sprintf(__('Editing <strong>%s</strong> (inactive)'), $file);
 		else
-			echo sprintf(__('Browsing <strong>%s</strong> (inactive)'), esc_html( $file ) );
+			echo sprintf(__('Browsing <strong>%s</strong> (inactive)'), $file);
 	}
 	?></big>
 </div>
@@ -232,7 +232,7 @@ foreach ( $plugin_files as $plugin_file ) :
 		continue;
 	}
 ?>
-		<li<?php echo $file == $plugin_file ? ' class="highlight"' : ''; ?>><a href="plugin-editor.php?file=<?php echo urlencode( $plugin_file ) ?>&amp;plugin=<?php echo urlencode( $plugin ) ?>"><?php echo esc_html( $plugin_file ); ?></a></li>
+		<li<?php echo $file == $plugin_file ? ' class="highlight"' : ''; ?>><a href="plugin-editor.php?file=<?php echo urlencode( $plugin_file ) ?>&amp;plugin=<?php echo urlencode( $plugin ) ?>"><?php echo $plugin_file ?></a></li>
 <?php endforeach; ?>
 	</ul>
 </div>
--- a/wp-admin/plugins.php
+++ b/wp-admin/plugins.php
@@ -17,7 +17,7 @@ $pagenum = $wp_list_table->get_pagenum();

 $action = $wp_list_table->current_action();

-$plugin = isset($_REQUEST['plugin']) ? wp_unslash( $_REQUEST['plugin'] ) : '';
+$plugin = isset($_REQUEST['plugin']) ? $_REQUEST['plugin'] : '';
 $s = isset($_REQUEST['s']) ? urlencode($_REQUEST['s']) : '';

 // Clean up request URI from temporary args for screen options/paging uri's to work as expected.
@@ -37,10 +37,10 @@ if ( $action ) {

 			check_admin_referer('activate-plugin_' . $plugin);

-			$result = activate_plugin($plugin, self_admin_url('plugins.php?error=true&plugin=' . urlencode( $plugin ) ), is_network_admin() );
+			$result = activate_plugin($plugin, self_admin_url('plugins.php?error=true&plugin=' . $plugin), is_network_admin() );
 			if ( is_wp_error( $result ) ) {
 				if ( 'unexpected_output' == $result->get_error_code() ) {
-					$redirect = self_admin_url('plugins.php?error=true&charsout=' . strlen($result->get_error_data()) . '&plugin=' . urlencode( $plugin ) . "&plugin_status=$status&paged=$page&s=$s");
+					$redirect = self_admin_url('plugins.php?error=true&charsout=' . strlen($result->get_error_data()) . '&plugin=' . $plugin . "&plugin_status=$status&paged=$page&s=$s");
 					wp_redirect(add_query_arg('_error_nonce', wp_create_nonce('plugin-activation-error_' . $plugin), $redirect));
 					exit;
 				} else {
@@ -67,7 +67,7 @@ if ( $action ) {

 			check_admin_referer('bulk-plugins');

-			$plugins = isset( $_POST['checked'] ) ? (array) wp_unslash( $_POST['checked'] ) : array();
+			$plugins = isset( $_POST['checked'] ) ? (array) $_POST['checked'] : array();

 			if ( is_network_admin() ) {
 				foreach ( $plugins as $i => $plugin ) {
@@ -107,9 +107,9 @@ if ( $action ) {
 			check_admin_referer( 'bulk-plugins' );

 			if ( isset( $_GET['plugins'] ) )
-				$plugins = explode( ',', wp_unslash( $_GET['plugins'] ) );
+				$plugins = explode( ',', $_GET['plugins'] );
 			elseif ( isset( $_POST['checked'] ) )
-				$plugins = (array) wp_unslash( $_POST['checked'] );
+				$plugins = (array) $_POST['checked'];
 			else
 				$plugins = array();

@@ -181,7 +181,7 @@ if ( $action ) {

 			check_admin_referer('bulk-plugins');

-			$plugins = isset( $_POST['checked'] ) ? (array) wp_unslash( $_POST['checked'] ) : array();
+			$plugins = isset( $_POST['checked'] ) ? (array) $_POST['checked'] : array();
 			// Do not deactivate plugins which are already deactivated.
 			if ( is_network_admin() ) {
 				$plugins = array_filter( $plugins, 'is_plugin_active_for_network' );
@@ -214,7 +214,7 @@ if ( $action ) {
 			check_admin_referer('bulk-plugins');

 			//$_POST = from the plugin form; $_GET = from the FTP details screen.
-			$plugins = isset( $_REQUEST['checked'] ) ? (array) wp_unslash( $_REQUEST['checked'] ) : array();
+			$plugins = isset( $_REQUEST['checked'] ) ? (array) $_REQUEST['checked'] : array();
 			if ( empty( $plugins ) ) {
 				wp_redirect( self_admin_url("plugins.php?plugin_status=$status&paged=$page&s=$s") );
 				exit;
@@ -226,14 +226,6 @@ if ( $action ) {
 				exit;
 			}

-			// Bail on all if any paths are invalid.
-			// validate_file() returns truthy for invalid files
-			$invalid_plugin_files = array_filter( $plugins, 'validate_file' );
-			if ( $invalid_plugin_files ) {
-				wp_redirect( self_admin_url("plugins.php?plugin_status=$status&paged=$page&s=$s") );
-				exit;
-			}
-
 			include(ABSPATH . 'wp-admin/update.php');

 			$parent_file = 'plugins.php';
--- a/wp-admin/press-this.php
+++ b/wp-admin/press-this.php
@@ -32,25 +32,8 @@ function press_it() {
 	if ( !current_user_can('edit_post', $post_ID) )
 		wp_die(__('You are not allowed to edit this post.'));

-	// Only accept categories if the user actually can assign
-	$category_tax = get_taxonomy( 'category' );
-	if ( current_user_can( $category_tax->cap->assign_terms ) ) {
-		$post['post_category'] = ( ! empty( $_POST['post_category'] ) ) ? $_POST['post_category'] : array();
-	}
-
-	// Only accept taxonomies if the user can actually assign
-	if ( ! empty( $_POST['tax_input'] ) ) {
-		$tax_input = $_POST['tax_input'];
-		foreach ( $tax_input as $tax => $_ti ) {
-			$tax_object = get_taxonomy( $tax );
-			if ( ! $tax_object || ! current_user_can( $tax_object->cap->assign_terms ) ) {
-				unset( $tax_input[ $tax ] );
-			}
-		}
-
-		$post['tax_input'] = $tax_input;
-	}
-
+	$post['post_category'] = isset($_POST['post_category']) ? $_POST['post_category'] : '';
+	$post['tax_input'] = isset($_POST['tax_input']) ? $_POST['tax_input'] : '';
 	$post['post_title'] = isset($_POST['title']) ? $_POST['title'] : '';
 	$content = isset($_POST['content']) ? $_POST['content'] : '';

@@ -540,81 +523,75 @@ $admin_body_class .= ' locale-' . sanitize_html_class( strtolower( str_replace(
 				</div>
 			</div>

-			<?php
+			<?php $tax = get_taxonomy( 'category' ); ?>
+			<div id="categorydiv" class="postbox">
+				<div class="handlediv" title="<?php esc_attr_e( 'Click to toggle' ); ?>"><br /></div>
+				<h3 class="hndle"><?php _e('Categories') ?></h3>
+				<div class="inside">
+				<div id="taxonomy-category" class="categorydiv">

-			$tax = get_taxonomy( 'category' );
-			if ( current_user_can( $tax->cap->assign_terms ) ) :
-				?>
-				<div id="categorydiv" class="postbox">
-					<div class="handlediv" title="<?php esc_attr_e( 'Click to toggle' ); ?>"><br /></div>
-					<h3 class="hndle"><?php _e('Categories') ?></h3>
-					<div class="inside">
-					<div id="taxonomy-category" class="categorydiv">
+					<ul id="category-tabs" class="category-tabs">
+						<li class="tabs"><a href="#category-all"><?php echo $tax->labels->all_items; ?></a></li>
+						<li class="hide-if-no-js"><a href="#category-pop"><?php _e( 'Most Used' ); ?></a></li>
+					</ul>

-						<ul id="category-tabs" class="category-tabs">
-							<li class="tabs"><a href="#category-all"><?php echo $tax->labels->all_items; ?></a></li>
-							<li class="hide-if-no-js"><a href="#category-pop"><?php _e( 'Most Used' ); ?></a></li>
+					<div id="category-pop" class="tabs-panel" style="display: none;">
+						<ul id="categorychecklist-pop" class="categorychecklist form-no-clear" >
+							<?php $popular_ids = wp_popular_terms_checklist( 'category' ); ?>
 						</ul>
-
-						<div id="category-pop" class="tabs-panel" style="display: none;">
-							<ul id="categorychecklist-pop" class="categorychecklist form-no-clear" >
-								<?php $popular_ids = wp_popular_terms_checklist( 'category' ); ?>
-							</ul>
-						</div>
-
-						<div id="category-all" class="tabs-panel">
-							<ul id="categorychecklist" data-wp-lists="list:category" class="categorychecklist form-no-clear">
-								<?php wp_terms_checklist($post_ID, array( 'taxonomy' => 'category', 'popular_cats' => $popular_ids ) ) ?>
-							</ul>
-						</div>
-
-						<?php if ( current_user_can($tax->cap->edit_terms) ) : ?>
-							<div id="category-adder" class="wp-hidden-children">
-								<h4>
-									<a id="category-add-toggle" href="#category-add" class="hide-if-no-js">
-										<?php printf( __( '+ %s' ), $tax->labels->add_new_item ); ?>
-									</a>
-								</h4>
-								<p id="category-add" class="category-add wp-hidden-child">
-									<label class="screen-reader-text" for="newcategory"><?php echo $tax->labels->add_new_item; ?></label>
-									<input type="text" name="newcategory" id="newcategory" class="form-required form-input-tip" value="<?php echo esc_attr( $tax->labels->new_item_name ); ?>" aria-required="true"/>
-									<label class="screen-reader-text" for="newcategory_parent">
-										<?php echo $tax->labels->parent_item_colon; ?>
-									</label>
-									<?php wp_dropdown_categories( array( 'taxonomy' => 'category', 'hide_empty' => 0, 'name' => 'newcategory_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => '&mdash; ' . $tax->labels->parent_item . ' &mdash;' ) ); ?>
-									<input type="button" id="category-add-submit" data-wp-lists="add:categorychecklist:category-add" class="button category-add-submit" value="<?php echo esc_attr( $tax->labels->add_new_item ); ?>" />
-									<?php wp_nonce_field( 'add-category', '_ajax_nonce-add-category', false ); ?>
-									<span id="category-ajax-response"></span>
-								</p>
-							</div>
-						<?php endif; ?>
 					</div>
+
+					<div id="category-all" class="tabs-panel">
+						<ul id="categorychecklist" data-wp-lists="list:category" class="categorychecklist form-no-clear">
+							<?php wp_terms_checklist($post_ID, array( 'taxonomy' => 'category', 'popular_cats' => $popular_ids ) ) ?>
+						</ul>
 					</div>
+
+					<?php if ( !current_user_can($tax->cap->assign_terms) ) : ?>
+					<p><em><?php _e('You cannot modify this Taxonomy.'); ?></em></p>
+					<?php endif; ?>
+					<?php if ( current_user_can($tax->cap->edit_terms) ) : ?>
+						<div id="category-adder" class="wp-hidden-children">
+							<h4>
+								<a id="category-add-toggle" href="#category-add" class="hide-if-no-js">
+									<?php printf( __( '+ %s' ), $tax->labels->add_new_item ); ?>
+								</a>
+							</h4>
+							<p id="category-add" class="category-add wp-hidden-child">
+								<label class="screen-reader-text" for="newcategory"><?php echo $tax->labels->add_new_item; ?></label>
+								<input type="text" name="newcategory" id="newcategory" class="form-required form-input-tip" value="<?php echo esc_attr( $tax->labels->new_item_name ); ?>" aria-required="true"/>
+								<label class="screen-reader-text" for="newcategory_parent">
+									<?php echo $tax->labels->parent_item_colon; ?>
+								</label>
+								<?php wp_dropdown_categories( array( 'taxonomy' => 'category', 'hide_empty' => 0, 'name' => 'newcategory_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => '&mdash; ' . $tax->labels->parent_item . ' &mdash;' ) ); ?>
+								<input type="button" id="category-add-submit" data-wp-lists="add:categorychecklist:category-add" class="button category-add-submit" value="<?php echo esc_attr( $tax->labels->add_new_item ); ?>" />
+								<?php wp_nonce_field( 'add-category', '_ajax_nonce-add-category', false ); ?>
+								<span id="category-ajax-response"></span>
+							</p>
+						</div>
+					<?php endif; ?>
 				</div>
-			<?php endif;
-
-			$tax = get_taxonomy( 'post_tag' );
-			if ( current_user_can( $tax->cap->assign_terms ) ) :
-				?>
-				<div id="tagsdiv-post_tag" class="postbox">
-					<div class="handlediv" title="<?php esc_attr_e( 'Click to toggle' ); ?>"><br /></div>
-					<h3><span><?php _e('Tags'); ?></span></h3>
-					<div class="inside">
-						<div class="tagsdiv" id="post_tag">
-							<div class="jaxtag">
-								<label class="screen-reader-text" for="newtag"><?php _e('Tags'); ?></label>
-								<input type="hidden" name="tax_input[post_tag]" class="the-tags" id="tax-input[post_tag]" value="" />
-								<div class="ajaxtag">
-									<input type="text" name="newtag[post_tag]" class="newtag form-input-tip" size="16" autocomplete="off" value="" />
-									<input type="button" class="button tagadd" value="<?php esc_attr_e('Add'); ?>" />
-								</div>
-							</div>
-							<div class="tagchecklist"></div>
-						</div>
-						<p class="tagcloud-link"><a href="#titlediv" class="tagcloud-link" id="link-post_tag"><?php _e('Choose from the most used tags'); ?></a></p>
-					</div>
 				</div>
-			<?php endif; ?>
+			</div>
+
+			<div id="tagsdiv-post_tag" class="postbox">
+				<div class="handlediv" title="<?php esc_attr_e( 'Click to toggle' ); ?>"><br /></div>
+				<h3><span><?php _e('Tags'); ?></span></h3>
+				<div class="inside">
+					<div class="tagsdiv" id="post_tag">
+						<div class="jaxtag">
+							<label class="screen-reader-text" for="newtag"><?php _e('Tags'); ?></label>
+							<input type="hidden" name="tax_input[post_tag]" class="the-tags" id="tax-input[post_tag]" value="" />
+							<div class="ajaxtag">
+								<input type="text" name="newtag[post_tag]" class="newtag form-input-tip" size="16" autocomplete="off" value="" />
+								<input type="button" class="button tagadd" value="<?php esc_attr_e('Add'); ?>" />
+							</div>
+						</div>
+						<div class="tagchecklist"></div>
+					</div>
+					<p class="tagcloud-link"><a href="#titlediv" class="tagcloud-link" id="link-post_tag"><?php _e('Choose from the most used tags'); ?></a></p>
+				</div>
+			</div>
 		</div>
 	</div>
 	<div class="posting">
--- a/wp-admin/revision.php
+++ b/wp-admin/revision.php
@@ -63,7 +63,7 @@ default :
 	if ( ! $post = get_post( $revision->post_parent ) )
 		break;

-	if ( ! current_user_can( 'read_post', $revision->ID ) || ! current_user_can( 'edit_post', $revision->post_parent ) )
+	if ( ! current_user_can( 'read_post', $revision->ID ) || ! current_user_can( 'read_post', $post->ID ) )
 		break;

 	// Revisions disabled and we're not looking at an autosave
--- a/wp-admin/theme-editor.php
+++ b/wp-admin/theme-editor.php
@@ -68,7 +68,7 @@ if ( empty( $file ) ) {
 	$relative_file = 'style.css';
 	$file = $allowed_files['style.css'];
 } else {
-	$relative_file = wp_unslash( $file );
+	$relative_file = $file;
 	$file = $theme->get_stylesheet_directory() . '/' . $relative_file;
 }

@@ -125,12 +125,10 @@ default:
 <div id="message" class="updated"><p><?php _e( 'File edited successfully.' ) ?></p></div>
 <?php endif;

-$file_description = get_file_description( $relative_file );
+$description = get_file_description( $file );
 $file_show = array_search( $file, array_filter( $allowed_files ) );
-$description = esc_html( $file_description );
-if ( $file_description != $file_show ) {
-	$description .= ' <span>(' . esc_html( $file_show ) . ')</span>';
-}
+if ( $description != $file_show )
+	$description .= ' <span>(' . $file_show . ')</span>';
 ?>
 <div class="wrap">
 <h2><?php echo esc_html( $title ); ?></h2>
@@ -179,9 +177,9 @@ if ( $allowed_files ) :
 		if ( 'style.css' == $filename )
 			echo "\t</ul>\n\t<h3>" . _x( 'Styles', 'Theme stylesheets in theme editor' ) . "</h3>\n\t<ul>\n";

-		$file_description = esc_html( get_file_description( $filename ) );
+		$file_description = get_file_description( $absolute_filename );
 		if ( $file_description != basename( $filename ) )
-			$file_description .= '<br /><span class="nonessential">(' . esc_html( $filename ) . ')</span>';
+			$file_description .= '<br /><span class="nonessential">(' . $filename . ')</span>';

 		if ( $absolute_filename == $file )
 			$file_description = '<span class="highlight">' . $file_description . '</span>';
--- a/wp-admin/update-core.php
+++ b/wp-admin/update-core.php
@@ -240,8 +240,6 @@ function list_plugin_updates() {
 	<tbody class="plugins">
 <?php
 	foreach ( (array) $plugins as $plugin_file => $plugin_data) {
-		$plugin_data = (object) _get_plugin_data_markup_translate( $plugin_file, (array) $plugin_data, false, true );
-
 		$info = plugins_api('plugin_information', array('slug' => $plugin_data->update->slug ));
 		if ( is_wp_error( $info ) ) {
 			$info = false;
--- a/wp-admin/user-edit.php
+++ b/wp-admin/user-edit.php
@@ -99,7 +99,7 @@ if ( is_multisite()
 // Execute confirmed email change. See send_confirmation_on_profile_email().
 if ( is_multisite() && IS_PROFILE_PAGE && isset( $_GET[ 'newuseremail' ] ) && $current_user->ID ) {
 	$new_email = get_option( $current_user->ID . '_new_email' );
-	if ( $new_email && hash_equals( $new_email[ 'hash' ], $_GET[ 'newuseremail' ] ) ) {
+	if ( $new_email[ 'hash' ] == $_GET[ 'newuseremail' ] ) {
 		$user = new stdClass;
 		$user->ID = $current_user->ID;
 		$user->user_email = esc_html( trim( $new_email[ 'newemail' ] ) );
@@ -110,8 +110,7 @@ if ( is_multisite() && IS_PROFILE_PAGE && isset( $_GET[ 'newuseremail' ] ) && $c
 		wp_redirect( add_query_arg( array('updated' => 'true'), self_admin_url( 'profile.php' ) ) );
 		die();
 	}
-} elseif ( is_multisite() && IS_PROFILE_PAGE && !empty( $_GET['dismiss'] ) && $current_user->ID . '_new_email' === $_GET['dismiss'] ) {
-	check_admin_referer( 'dismiss-' . $current_user->ID . '_new_email' );
+} elseif ( is_multisite() && IS_PROFILE_PAGE && !empty( $_GET['dismiss'] ) && $current_user->ID . '_new_email' == $_GET['dismiss'] ) {
 	delete_option( $current_user->ID . '_new_email' );
 	wp_redirect( add_query_arg( array('updated' => 'true'), self_admin_url( 'profile.php' ) ) );
 	die();
@@ -205,7 +204,7 @@ include(ABSPATH . 'wp-admin/admin-header.php');
 	<p><strong><?php _e('User updated.') ?></strong></p>
 	<?php endif; ?>
 	<?php if ( $wp_http_referer && !IS_PROFILE_PAGE ) : ?>
-	<p><a href="<?php echo esc_url( wp_validate_redirect( esc_url_raw( $wp_http_referer ), self_admin_url( 'users.php' ) ) ); ?>"><?php _e('&larr; Back to Users'); ?></a></p>
+	<p><a href="<?php echo esc_url( $wp_http_referer ); ?>"><?php _e('&larr; Back to Users'); ?></a></p>
 	<?php endif; ?>
 </div>
 <?php endif; ?>
@@ -414,7 +413,7 @@ if ( is_multisite() && is_network_admin() && ! IS_PROFILE_PAGE && current_user_c
 	$new_email = get_option( $current_user->ID . '_new_email' );
 	if ( $new_email && $new_email['newemail'] != $current_user->user_email && $profileuser->ID == $current_user->ID ) : ?>
 	<div class="updated inline">
-	<p><?php printf( __('There is a pending change of your e-mail to <code>%1$s</code>. <a href="%2$s">Cancel</a>'), esc_html( $new_email['newemail'] ), esc_url( wp_nonce_url( self_admin_url( 'profile.php?dismiss=' . $current_user->ID . '_new_email' ), 'dismiss-' . $current_user->ID . '_new_email' ) ) ); ?></p>
+	<p><?php printf( __('There is a pending change of your e-mail to <code>%1$s</code>. <a href="%2$s">Cancel</a>'), $new_email['newemail'], esc_url( self_admin_url( 'profile.php?dismiss=' . $current_user->ID . '_new_email' ) ) ); ?></p>
 	</div>
 	<?php endif; ?>
 	</td>
--- a/wp-admin/user-new.php
+++ b/wp-admin/user-new.php
@@ -69,7 +69,7 @@ if ( isset($_REQUEST['action']) && 'adduser' == $_REQUEST['action'] ) {
 			add_existing_user_to_blog( array( 'user_id' => $user_id, 'role' => $_REQUEST[ 'role' ] ) );
 			$redirect = add_query_arg( array('update' => 'addnoconfirmation'), 'user-new.php' );
 		} else {
-			$newuser_key = wp_generate_password( 20, false );
+			$newuser_key = substr( md5( $user_id ), 0, 5 );
 			add_option( 'new_user_' . $newuser_key, array( 'user_id' => $user_id, 'email' => $user_details->user_email, 'role' => $_REQUEST[ 'role' ] ) );

 			$roles = get_editable_roles();
--- a/wp-admin/widgets.php
+++ b/wp-admin/widgets.php
@@ -17,8 +17,6 @@ if ( ! current_user_can('edit_theme_options') )

 $widgets_access = get_user_setting( 'widgets_access' );
 if ( isset($_GET['widgets-access']) ) {
-	check_admin_referer( 'widgets-access' );
-
 	$widgets_access = 'on' == $_GET['widgets-access'] ? 'on' : 'off';
 	set_user_setting( 'widgets_access', $widgets_access );
 }
--- a/wp-includes/class-phpmailer.php
+++ b/wp-includes/class-phpmailer.php
--- a/wp-includes/class-smtp.php
+++ b/wp-includes/class-smtp.php
--- a/wp-includes/class-snoopy.php
+++ b/wp-includes/class-snoopy.php
@@ -999,23 +999,20 @@ class Snoopy
 		if(!empty($this->user) || !empty($this->pass))
 			$headers[] = "Authorization: BASIC ".base64_encode($this->user.":".$this->pass);

-		$headerfile = tempnam( $this->temp_dir, "sno" );
-		$cmdline_params = '-k -D ' . escapeshellarg( $headerfile );
-
-		foreach ( $headers as $header ) {
-			$cmdline_params .= ' -H ' . escapeshellarg( $header );
+		for($curr_header = 0; $curr_header < count($headers); $curr_header++) {
+			$safer_header = strtr( $headers[$curr_header], "\"", " " );
+			$cmdline_params .= " -H \"".$safer_header."\"";
 		}

-		if ( ! empty( $body ) ) {
-			$cmdline_params .= ' -d ' . escapeshellarg( $body );
-		}
+		if(!empty($body))
+			$cmdline_params .= " -d \"$body\"";

-		if ( $this->read_timeout > 0 ) {
-			$cmdline_params .= ' -m ' . escapeshellarg( $this->read_timeout );
-		}
+		if($this->read_timeout > 0)
+			$cmdline_params .= " -m ".$this->read_timeout;

+		$headerfile = tempnam($this->temp_dir, "sno");

-		exec( $this->curl_path . ' ' . $cmdline_params . ' ' . escapeshellarg( $URI ), $results, $return );
+		exec($this->curl_path." -k -D \"$headerfile\"".$cmdline_params." \"".escapeshellcmd($URI)."\"",$results,$return);

 		if($return)
 		{
--- a/wp-includes/class-wp-customize-manager.php
+++ b/wp-includes/class-wp-customize-manager.php
@@ -175,24 +175,6 @@ final class WP_Customize_Manager {

 		$this->theme = wp_get_theme( isset( $_REQUEST['theme'] ) ? $_REQUEST['theme'] : null );

-		/*
-		 * Clear incoming post data if the user lacks a CSRF token (nonce). Note that the customizer
-		 * application will inject the customize_preview_nonce query parameter into all Ajax requests.
-		 * For similar behavior elsewhere in WordPress, see rest_cookie_check_errors() which logs out
-		 * a user when a valid nonce isn't present.
-		 */
-		$has_post_data_nonce = (
-			check_ajax_referer( 'preview-customize_' . $this->get_stylesheet(), 'nonce', false )
-			||
-			check_ajax_referer( 'save-customize_' . $this->get_stylesheet(), 'nonce', false )
-			||
-			check_ajax_referer( 'preview-customize_' . $this->get_stylesheet(), 'customize_preview_nonce', false )
-		);
-		if ( ! $has_post_data_nonce ) {
-			unset( $_POST['customized'] );
-			unset( $_REQUEST['customized'] );
-		}
-
 		if ( $this->is_theme_active() ) {
 			// Once the theme is loaded, we'll validate it.
 			add_action( 'after_setup_theme', array( $this, 'after_setup_theme' ) );
--- a/wp-includes/class-wp-theme.php
+++ b/wp-includes/class-wp-theme.php
@@ -655,9 +655,8 @@ final class WP_Theme implements ArrayAccess {
 	private function markup_header( $header, $value, $translate ) {
 		switch ( $header ) {
 			case 'Name' :
-				if ( empty( $value ) ) {
-					$value = esc_html( $this->get_stylesheet() );
-				}
+				if ( empty( $value ) )
+					$value = $this->get_stylesheet();
 				break;
 			case 'Description' :
 				$value = wptexturize( $value );
--- a/wp-includes/class-wp-xmlrpc-server.php
+++ b/wp-includes/class-wp-xmlrpc-server.php
@@ -331,11 +331,6 @@ class wp_xmlrpc_server extends IXR_Server {
 			if ( isset($meta['id']) ) {
 				$meta['id'] = (int) $meta['id'];
 				$pmeta = get_metadata_by_mid( 'post', $meta['id'] );
-
-				if ( ! $pmeta || $pmeta->post_id != $post_id ) {
-					continue;
-				}
-
 				if ( isset($meta['key']) ) {
 					$meta['key'] = wp_unslash( $meta['key'] );
 					if ( $meta['key'] !== $pmeta->meta_key )
@@ -1214,31 +1209,10 @@ class wp_xmlrpc_server extends IXR_Server {
 	 * @param array|IXR_Error $content_struct Post data to insert.
 	 */
 	protected function _insert_post( $user, $content_struct ) {
-		$defaults = array(
-			'post_status'    => 'draft',
-			'post_type'      => 'post',
-			'post_author'    => null,
-			'post_password'  => null,
-			'post_excerpt'   => null,
-			'post_content'   => null,
-			'post_title'     => null,
-			'post_date'      => null,
-			'post_date_gmt'  => null,
-			'post_format'    => null,
-			'post_name'      => null,
-			'post_thumbnail' => null,
-			'post_parent'    => null,
-			'ping_status'    => null,
-			'comment_status' => null,
-			'custom_fields'  => null,
-			'terms_names'    => null,
-			'terms'          => null,
-			'sticky'         => null,
-			'enclosure'      => null,
-			'ID'             => null,
-		);
+		$defaults = array( 'post_status' => 'draft', 'post_type' => 'post', 'post_author' => 0,
+			'post_password' => '', 'post_excerpt' => '', 'post_content' => '', 'post_title' => '' );

-		$post_data = wp_parse_args( array_intersect_key( $content_struct, $defaults ), $defaults );
+		$post_data = wp_parse_args( $content_struct, $defaults );

 		$post_type = get_post_type_object( $post_data['post_type'] );
 		if ( ! $post_type )
@@ -1419,6 +1393,9 @@ class wp_xmlrpc_server extends IXR_Server {

 			$post_data['tax_input'] = $terms;
 			unset( $post_data['terms'], $post_data['terms_names'] );
+		} else {
+			// do not allow direct submission of 'tax_input', clients must use 'terms' and/or 'terms_names'
+			unset( $post_data['tax_input'], $post_data['post_category'], $post_data['tags_input'] );
 		}

 		if ( isset( $post_data['post_format'] ) ) {
--- a/wp-includes/feed.php
+++ b/wp-includes/feed.php
@@ -469,7 +469,7 @@ function rss_enclosure() {
 				 *
 				 * @param string $html_link_tag The HTML link tag with a URI and other attributes.
 				 */
-				echo apply_filters( 'rss_enclosure', '<enclosure url="' . esc_url( trim( $enclosure[0] ) ) . '" length="' . absint( trim( $enclosure[1] ) ) . '" type="' . esc_attr( $type ) . '" />' . "\n" );
+				echo apply_filters( 'rss_enclosure', '<enclosure url="' . trim( htmlspecialchars( $enclosure[0] ) ) . '" length="' . trim( $enclosure[1] ) . '" type="' . $type . '" />' . "\n" );
 			}
 		}
 	}
@@ -503,7 +503,7 @@ function atom_enclosure() {
 				 *
 				 * @param string $html_link_tag The HTML link tag with a URI and other attributes.
 				 */
-				echo apply_filters( 'atom_enclosure', '<link href="' . esc_url( trim( $enclosure[0] ) ) . '" rel="enclosure" length="' . absint( trim( $enclosure[1] ) ) . '" type="' . esc_attr( trim( $enclosure[2] ) ) . '" />' . "\n" );
+				echo apply_filters( 'atom_enclosure', '<link href="' . trim( htmlspecialchars( $enclosure[0] ) ) . '" rel="enclosure" length="' . trim( $enclosure[1] ) . '" type="' . trim( $enclosure[2] ) . '" />' . "\n" );
 			}
 		}
 	}
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -1155,8 +1155,7 @@ function remove_accents($string) {
 * operating systems and special characters requiring special escaping
 * to manipulate at the command line. Replaces spaces and consecutive
 * dashes with a single dash. Trims period, dash and underscore from beginning
- * and end of filename. It is not guaranteed that this function will return a
- * filename that is allowed to be uploaded.
+ * and end of filename.
 *
 * @since 2.1.0
 *
@@ -1181,14 +1180,6 @@ function sanitize_file_name( $filename ) {
 	$filename = preg_replace( '/[\r\n\t -]+/', '-', $filename );
 	$filename = trim( $filename, '.-_' );

-	if ( false === strpos( $filename, '.' ) ) {
-		$mime_types = wp_get_mime_types();
-		$filetype = wp_check_filetype( 'test.' . $filename, $mime_types );
-		if ( $filetype['ext'] === $filename ) {
-			$filename = 'unnamed-file.' . $filetype['ext'];
-		}
-	}
-
 	// Split the filename into a base and extension[s]
 	$parts = explode('.', $filename);

--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -1575,38 +1575,18 @@ function path_join( $base, $path ) {
 /**
 * Normalize a filesystem path.
 *
- * On windows systems, replaces backslashes with forward slashes
- * and forces upper-case drive letters.
- * Allows for two leading slashes for Windows network shares, but
- * ensures that all other duplicate slashes are reduced to a single.
+ * Replaces backslashes with forward slashes for Windows systems, and ensures
+ * no duplicate slashes exist.
 *
 * @since 3.9.0
- * @since 4.4.0 Ensures upper-case drive letters on Windows systems.
- * @since 4.5.0 Allows for Windows network shares.
- * @since 4.9.7 Allows for PHP file wrappers.
 *
 * @param string $path Path to normalize.
 * @return string Normalized path.
 */
 function wp_normalize_path( $path ) {
-	$wrapper = '';
-	if ( wp_is_stream( $path ) ) {
-		list( $wrapper, $path ) = explode( '://', $path, 2 );
-		$wrapper .= '://';
-	}
-
-	// Standardise all paths to use /
 	$path = str_replace( '\\', '/', $path );
-
-	// Replace multiple slashes down to a singular, allowing for network shares having two slashes.
-	$path = preg_replace( '|(?<=.)/+|', '/', $path );
-
-	// Windows paths should uppercase the drive letter
-	if ( ':' === substr( $path, 1, 1 ) ) {
-		$path = ucfirst( $path );
-	}
-
-	return $wrapper . $path;
+	$path = preg_replace( '|/+|','/', $path );
+	return $path;
 }

 /**
@@ -2088,7 +2068,7 @@ function wp_check_filetype( $filename, $mimes = null ) {
 * If it's determined that the extension does not match the file's real type,
 * then the "proper_filename" value will be set with a proper filename and extension.
 *
- * Currently this function only supports renaming images validated via wp_get_image_mime().
+ * Currently this function only supports validating images known to getimagesize().
 *
 * @since 3.0.0
 *
@@ -2113,15 +2093,14 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 		return compact( 'ext', 'type', 'proper_filename' );
 	}

-	// Validate image types.
-	if ( $type && 0 === strpos( $type, 'image/' ) ) {
+	// We're able to validate images using GD
+	if ( $type && 0 === strpos( $type, 'image/' ) && function_exists('getimagesize') ) {

 		// Attempt to figure out what type of image it actually is
-		$real_mime = wp_get_image_mime( $file );
+		$imgstats = @getimagesize( $file );

-		if ( ! $real_mime ) {
-			$type = $ext = false;
-		} elseif ( $real_mime != $type ) {
+		// If getimagesize() knows what kind of image it really is and if the real MIME doesn't match the claimed MIME
+		if ( !empty($imgstats['mime']) && $imgstats['mime'] != $type ) {
 			/**
 			 * Filter the list mapping image mime types to their respective extensions.
 			 *
@@ -2138,10 +2117,10 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 			) );

 			// Replace whatever is after the last period in the filename with the correct extension
-			if ( ! empty( $mime_to_ext[ $real_mime ] ) ) {
+			if ( ! empty( $mime_to_ext[ $imgstats['mime'] ] ) ) {
 				$filename_parts = explode( '.', $filename );
 				array_pop( $filename_parts );
-				$filename_parts[] = $mime_to_ext[ $real_mime ];
+				$filename_parts[] = $mime_to_ext[ $imgstats['mime'] ];
 				$new_filename = implode( '.', $filename_parts );

 				if ( $new_filename != $filename ) {
@@ -2151,20 +2130,8 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 				$wp_filetype = wp_check_filetype( $new_filename, $mimes );
 				$ext = $wp_filetype['ext'];
 				$type = $wp_filetype['type'];
-			} else {
-				$type = $ext = false;
 			}
 		}
-	} elseif ( function_exists( 'finfo_file' ) ) {
-		// Use finfo_file if available to validate non-image files.
-		$finfo = finfo_open( FILEINFO_MIME_TYPE );
-		$real_mime = finfo_file( $finfo, $file );
-		finfo_close( $finfo );
-
-		// If the extension does not match the file's real type, return false.
-		if ( $real_mime !== $type ) {
-			$type = $ext = false;
-		}
 	}

 	/**
@@ -2182,38 +2149,6 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 	return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes );
 }

-/**
- * Returns the real mime type of an image file.
- *
- * This depends on exif_imagetype() or getimagesize() to determine real mime types.
- *
- * @since 4.7.1
- *
- * @param string $file Full path to the file.
- * @return string|false The actual mime type or false if the type cannot be determined.
- */
-function wp_get_image_mime( $file ) {
-	/*
-	 * Use exif_imagetype() to check the mimetype if available or fall back to
-	 * getimagesize() if exif isn't avaialbe. If either function throws an Exception
-	 * we assume the file could not be validated.
-	 */
-	try {
-		if ( is_callable( 'exif_imagetype' ) ) {
-			$mime = image_type_to_mime_type( exif_imagetype( $file ) );
-		} elseif ( function_exists( 'getimagesize' ) ) {
-			$imagesize = getimagesize( $file );
-			$mime = ( isset( $imagesize['mime'] ) ) ? $imagesize['mime'] : false;
-		} else {
-			$mime = false;
-		}
-	} catch ( Exception $e ) {
-		$mime = false;
-	}
-
-	return $mime;
-}
-
 /**
 * Retrieve list of mime types and file extensions.
 *
@@ -2350,9 +2285,8 @@ function get_allowed_mime_types( $user = null ) {
 	if ( function_exists( 'current_user_can' ) )
 		$unfiltered = $user ? user_can( $user, 'unfiltered_html' ) : current_user_can( 'unfiltered_html' );

-	if ( empty( $unfiltered ) ) {
-		unset( $t['htm|html'], $t['js'] );
-	}
+	if ( empty( $unfiltered ) )
+		unset( $t['htm|html'] );

 	/**
 	 * Filter list of allowed mime types and file extensions.
@@ -4875,29 +4809,3 @@ function wp_validate_boolean( $var ) {

 	return (bool) $var;
 }
-
-/**
- * Deletes a file if its path is within the given directory.
- *
- * @since 4.9.7
- *
- * @param string $file      Absolute path to the file to delete.
- * @param string $directory Absolute path to a directory.
- * @return bool True on success, false on failure.
- */
-function wp_delete_file_from_directory( $file, $directory ) {
-	$real_file = realpath( wp_normalize_path( $file ) );
-	$real_directory = realpath( wp_normalize_path( $directory ) );
-
-	if ( false === $real_file || false === $real_directory || strpos( wp_normalize_path( $real_file ), trailingslashit( wp_normalize_path( $real_directory ) ) ) !== 0 ) {
-		return false;
-	}
-
-	/** This filter is documented in wp-admin/custom-header.php */
-	$delete = apply_filters( 'wp_delete_file', $file );
-	if ( ! empty( $delete ) ) {
-		@unlink( $delete );
-	}
-
-	return true;
-}
--- a/wp-includes/general-template.php
+++ b/wp-includes/general-template.php
@@ -2513,14 +2513,12 @@ function language_attributes($doctype = 'html') {
 	if ( function_exists( 'is_rtl' ) && is_rtl() )
 		$attributes[] = 'dir="rtl"';

-	if ( $lang = get_bloginfo( 'language' ) ) {
-		if ( get_option( 'html_type' ) == 'text/html' || $doctype == 'html' ) {
-			$attributes[] = 'lang="' . esc_attr( $lang ) . '"';
-		}
+	if ( $lang = get_bloginfo('language') ) {
+		if ( get_option('html_type') == 'text/html' || $doctype == 'html' )
+			$attributes[] = "lang=\"$lang\"";

-		if ( get_option( 'html_type' ) != 'text/html' || $doctype == 'xhtml' ) {
-			$attributes[] = 'xml:lang="' . esc_attr( $lang ) . '"';
-		}
+		if ( get_option('html_type') != 'text/html' || $doctype == 'xhtml' )
+			$attributes[] = "xml:lang=\"$lang\"";
 	}

 	$output = implode(' ', $attributes);
@@ -2999,25 +2997,25 @@ function get_the_generator( $type = '' ) {

 	switch ( $type ) {
 		case 'html':
-			$gen = '<meta name="generator" content="WordPress ' . esc_attr( get_bloginfo( 'version' ) ) . '">';
+			$gen = '<meta name="generator" content="WordPress ' . get_bloginfo( 'version' ) . '">';
 			break;
 		case 'xhtml':
-			$gen = '<meta name="generator" content="WordPress ' . esc_attr( get_bloginfo( 'version' ) ) . '" />';
+			$gen = '<meta name="generator" content="WordPress ' . get_bloginfo( 'version' ) . '" />';
 			break;
 		case 'atom':
-			$gen = '<generator uri="https://wordpress.org/" version="' . esc_attr( get_bloginfo_rss( 'version' ) ) . '">WordPress</generator>';
+			$gen = '<generator uri="http://wordpress.org/" version="' . get_bloginfo_rss( 'version' ) . '">WordPress</generator>';
 			break;
 		case 'rss2':
-			$gen = '<generator>' . esc_url_raw( 'https://wordpress.org/?v=' . get_bloginfo_rss( 'version' ) ) . '</generator>';
+			$gen = '<generator>http://wordpress.org/?v=' . get_bloginfo_rss( 'version' ) . '</generator>';
 			break;
 		case 'rdf':
-			$gen = '<admin:generatorAgent rdf:resource="' . esc_url_raw( 'https://wordpress.org/?v=' . get_bloginfo_rss( 'version' ) ) . '" />';
+			$gen = '<admin:generatorAgent rdf:resource="http://wordpress.org/?v=' . get_bloginfo_rss( 'version' ) . '" />';
 			break;
 		case 'comment':
-			$gen = '<!-- generator="WordPress/' . esc_attr( get_bloginfo( 'version' ) ) . '" -->';
+			$gen = '<!-- generator="WordPress/' . get_bloginfo( 'version' ) . '" -->';
 			break;
 		case 'export':
-			$gen = '<!-- generator="WordPress/' . esc_attr( get_bloginfo_rss( 'version' ) ) . '" created="' . date( 'Y-m-d H:i' ) . '" -->';
+			$gen = '<!-- generator="WordPress/' . get_bloginfo_rss('version') . '" created="'. date('Y-m-d H:i') . '" -->';
 			break;
 	}

--- a/wp-includes/http.php
+++ b/wp-includes/http.php
@@ -466,7 +466,7 @@ function wp_http_validate_url( $url ) {

 	if ( ! $same_host ) {
 		$host = trim( $parsed_url['host'], '.' );
-		if ( preg_match( '#^(([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)\.){3}([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)$#', $host ) ) {
+		if ( preg_match( '#^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$#', $host ) ) {
 			$ip = $host;
 		} else {
 			$ip = gethostbyname( $host );
@@ -475,7 +475,7 @@ function wp_http_validate_url( $url ) {
 		}
 		if ( $ip ) {
 			$parts = array_map( 'intval', explode( '.', $ip ) );
-			if ( 127 === $parts[0] || 10 === $parts[0] || 0 === $parts[0]
+			if ( 127 === $parts[0] || 10 === $parts[0]
 				|| ( 172 === $parts[0] && 16 <= $parts[1] && 31 >= $parts[1] )
 				|| ( 192 === $parts[0] && 168 === $parts[1] )
 			) {
--- a/wp-includes/js/mce-view.js
+++ b/wp-includes/js/mce-view.js
@@ -131,14 +131,6 @@ window.wp = window.wp || {};
 				importStyles = this.type === 'video' || this.type === 'audio' || this.type === 'playlist';

 			if ( head || body.indexOf( '<script' ) !== -1 ) {
-				if ( body.indexOf( '[' ) !== -1 && body.indexOf( ']' ) !== -1 ) {
-					var shortcodesRegExp = new RegExp( '\\[\\/?(?:' + window.mceViewL10n.shortcodes.join( '|' ) + ')[^\\]]*?\\]', 'g' );
-					// Escape tags inside shortcode previews.
-					body = body.replace( shortcodesRegExp, function( match ) {
-						return match.replace( /</g, '&lt;' ).replace( />/g, '&gt;' );
-					} );
-				}
-
 				this.getNodes( function ( editor, node, content ) {
 					var dom = editor.dom,
 						styles = '',
--- a/wp-includes/js/mce-view.min.js
+++ b/wp-includes/js/mce-view.min.js
--- a/wp-includes/js/mediaelement/flashmediaelement.swf
+++ b/wp-includes/js/mediaelement/flashmediaelement.swf
--- a/wp-includes/js/mediaelement/silverlightmediaelement.xap
+++ b/wp-includes/js/mediaelement/silverlightmediaelement.xap
--- a/wp-includes/js/plupload/handlers.js
+++ b/wp-includes/js/plupload/handlers.js
@@ -328,24 +328,15 @@ function uploadError(fileObj, errorCode, message, uploader) {
 	}
 }

-function uploadSizeError( up, file ) {
-	var message, errorDiv;
+function uploadSizeError( up, file, over100mb ) {
+	var message;

-	message = pluploadL10n.file_exceeds_size_limit.replace('%s', file.name);
+	if ( over100mb )
+		message = pluploadL10n.big_upload_queued.replace('%s', file.name) + ' ' + pluploadL10n.big_upload_failed.replace('%1$s', '<a class="uploader-html" href="#">').replace('%2$s', '</a>');
+	else
+		message = pluploadL10n.file_exceeds_size_limit.replace('%s', file.name);

-	// Construct the error div.
-	errorDiv = jQuery( '<div />' )
-		.attr( {
-			'id':    'media-item-' + file.id,
-			'class': 'media-item error'
-		} )
-		.append(
-			jQuery( '<p />' )
-				.text( message )
-		);
-
-	// Append the error.
-	jQuery('#media-items').append( errorDiv );
+	jQuery('#media-items').append('<div id="media-item-' + file.id + '" class="media-item error"><p>' + message + '</p></div>');
 	up.removeFile(file);
 }

--- a/wp-includes/js/plupload/handlers.min.js
+++ b/wp-includes/js/plupload/handlers.min.js
--- a/wp-includes/js/plupload/plupload.flash.swf
+++ b/wp-includes/js/plupload/plupload.flash.swf
--- a/wp-includes/js/wplink.js
+++ b/wp-includes/js/wplink.js
@@ -210,13 +210,6 @@ var wpLink;

 			attrs = wpLink.getAttrs();

-			var parser = document.createElement( 'a' );
-			parser.href = attrs.href;
-
-			if ( 'javascript:' === parser.protocol || 'data:' === parser.protocol ) { // jshint ignore:line
-				attrs.href = '';
-			}
-
 			// If there's no href, return.
 			if ( ! attrs.href || attrs.href == 'http://' )
 				return;
@@ -230,7 +223,7 @@ var wpLink;
 			}

 			if ( attrs.target ) {
-				html += ' rel="noopener" target="' + attrs.target + '"';
+				html += ' target="' + attrs.target + '"';
 			}

 			html += '>';
@@ -282,13 +275,6 @@ var wpLink;

 			link = editor.dom.getParent( editor.selection.getNode(), 'a[href]' );

-			var parser = document.createElement( 'a' );
-			parser.href = attrs.href;
-
-			if ( 'javascript:' === parser.protocol || 'data:' === parser.protocol ) { // jshint ignore:line
-				attrs.href = '';
-			}
-
 			// If the values are empty, unlink and return
 			if ( ! attrs.href || attrs.href == 'http://' ) {
 				editor.execCommand( 'unlink' );
--- a/wp-includes/js/wplink.min.js
+++ b/wp-includes/js/wplink.min.js
--- a/wp-includes/media.php
+++ b/wp-includes/media.php
@@ -2297,7 +2297,7 @@ function wp_embed_handler_googlevideo( $matches, $attr, $url, $rawattr ) {
 */
 function wp_embed_handler_youtube( $matches, $attr, $url, $rawattr ) {
 	global $wp_embed;
-	$embed = $wp_embed->autoembed( sprintf( "https://youtube.com/watch?v=%s", urlencode( $matches[2] ) ) );
+	$embed = $wp_embed->autoembed( "https://youtube.com/watch?v={$matches[2]}" );
 	/**
 	 * Filter the YoutTube embed output.
 	 *
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -713,7 +713,7 @@ function wpmu_validate_blog_signup( $blogname, $blog_title, $user = '' ) {
 function wpmu_signup_blog( $domain, $path, $title, $user, $user_email, $meta = array() )  {
 	global $wpdb;

-	$key = substr( md5( time() . wp_rand() . $domain ), 0, 16 );
+	$key = substr( md5( time() . rand() . $domain ), 0, 16 );
 	$meta = serialize($meta);

 	$wpdb->insert( $wpdb->signups, array(
@@ -748,7 +748,7 @@ function wpmu_signup_user( $user, $user_email, $meta = array() ) {
 	// Format data
 	$user = preg_replace( '/\s+/', '', sanitize_user( $user, true ) );
 	$user_email = sanitize_email( $user_email );
-	$key = substr( md5( time() . wp_rand() . $user_email ), 0, 16 );
+	$key = substr( md5( time() . rand() . $user_email ), 0, 16 );
 	$meta = serialize($meta);

 	$wpdb->insert( $wpdb->signups, array(
--- a/wp-includes/pluggable.php
+++ b/wp-includes/pluggable.php
@@ -1007,14 +1007,18 @@ function auth_redirect() {
 		}
 	}

-	/**
-	 * Filters the authentication redirect scheme.
-	 *
-	 * @since 2.9.0
-	 *
-	 * @param string $scheme Authentication redirect scheme. Default empty.
-	 */
-	$scheme = apply_filters( 'auth_redirect_scheme', '' );
+	if ( is_user_admin() ) {
+		$scheme = 'logged_in';
+	} else {
+		/**
+		 * Filter the authentication redirect scheme.
+		 *
+		 * @since 2.9.0
+		 *
+		 * @param string $scheme Authentication redirect scheme. Default empty.
+		 */
+		$scheme = apply_filters( 'auth_redirect_scheme', '' );
+	}

 	if ( $user_id = wp_validate_auth_cookie( '',  $scheme) ) {
 		/**
@@ -1240,7 +1244,7 @@ if ( !function_exists('wp_validate_redirect') ) :
 * @return string redirect-sanitized URL
 **/
 function wp_validate_redirect($location, $default = '') {
-	$location = trim( $location, " \t\n\r\0\x08\x0B" );
+	$location = trim( $location );
 	// browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'
 	if ( substr($location, 0, 2) == '//' )
 		$location = 'http:' . $location;
@@ -1248,8 +1252,7 @@ function wp_validate_redirect($location, $default = '') {
 	// In php 5 parse_url may fail if the URL query part contains http://, bug #38143
 	$test = ( $cut = strpos($location, '?') ) ? substr( $location, 0, $cut ) : $location;

-	// @-operator is used to prevent possible warnings in PHP < 5.3.3.
-	$lp = @parse_url($test);
+	$lp  = parse_url($test);

 	// Give up if malformed URL
 	if ( false === $lp )
@@ -1259,17 +1262,9 @@ function wp_validate_redirect($location, $default = '') {
 	if ( isset($lp['scheme']) && !('http' == $lp['scheme'] || 'https' == $lp['scheme']) )
 		return $default;

-	// Reject if certain components are set but host is not. This catches urls like https:host.com for which parse_url does not set the host field.
-	if ( ! isset( $lp['host'] ) && ( isset( $lp['scheme'] ) || isset( $lp['user'] ) || isset( $lp['pass'] ) || isset( $lp['port'] ) ) ) {
+	// Reject if scheme is set but host is not. This catches urls like https:host.com for which parse_url does not set the host field.
+	if ( isset($lp['scheme'])  && !isset($lp['host']) )
 		return $default;
-	}
-
-	// Reject malformed components parse_url() can return on odd inputs.
-	foreach ( array( 'user', 'pass', 'host' ) as $component ) {
-		if ( isset( $lp[ $component ] ) && strpbrk( $lp[ $component ], ':/?#@' ) ) {
-			return $default;
-		}
-	}

 	$wpp = parse_url(home_url());

--- a/wp-includes/post-template.php
+++ b/wp-includes/post-template.php
@@ -1506,7 +1506,7 @@ function wp_get_attachment_link( $id = 0, $size = 'thumbnail', $permalink = fals
 	 * @param bool        $icon      Whether to include an icon. Default false.
 	 * @param string|bool $text      If string, will be link text. Default false.
 	 */
-	return apply_filters( 'wp_get_attachment_link', "<a href='" . esc_url( $url ) . "'>$link_text</a>", $id, $size, $permalink, $icon, $text );
+	return apply_filters( 'wp_get_attachment_link', "<a href='$url'>$link_text</a>", $id, $size, $permalink, $icon, $text );
 }

 /**
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -4176,10 +4176,10 @@ function get_page_by_path( $page_path, $output = OBJECT, $post_type = 'page' ) {
 	$page_path = str_replace('%2F', '/', $page_path);
 	$page_path = str_replace('%20', ' ', $page_path);
 	$parts = explode( '/', trim( $page_path, '/' ) );
+	$parts = esc_sql( $parts );
 	$parts = array_map( 'sanitize_title_for_query', $parts );
-	$escaped_parts = esc_sql( $parts );

-	$in_string = "'" . implode( "','", $escaped_parts ) . "'";
+	$in_string = "'" . implode( "','", $parts ) . "'";

 	if ( is_array( $post_type ) ) {
 		$post_types = $post_type;
@@ -4806,79 +4806,46 @@ function wp_delete_attachment( $post_id, $force_delete = false ) {
 	/** This action is documented in wp-includes/post.php */
 	do_action( 'deleted_post', $post_id );

-	wp_delete_attachment_files( $post_id, $meta, $backup_sizes, $file );
-
-	clean_post_cache( $post );
-
-	return $post;
-}
-
-/**
- * Deletes all files that belong to the given attachment.
- *
- * @since 4.9.7
- *
- * @param int    $post_id      Attachment ID.
- * @param array  $meta         The attachment's meta data.
- * @param array  $backup_sizes The meta data for the attachment's backup images.
- * @param string $file         Absolute path to the attachment's file.
- * @return bool True on success, false on failure.
- */
-function wp_delete_attachment_files( $post_id, $meta, $backup_sizes, $file ) {
-	global $wpdb;
-
 	$uploadpath = wp_upload_dir();
-	$deleted    = true;

 	if ( ! empty($meta['thumb']) ) {
 		// Don't delete the thumb if another attachment uses it.
 		if (! $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE %s AND post_id <> %d", '%' . $wpdb->esc_like( $meta['thumb'] ) . '%', $post_id)) ) {
 			$thumbfile = str_replace(basename($file), $meta['thumb'], $file);
-			if ( ! empty( $thumbfile ) ) {
-				$thumbfile = path_join( $uploadpath['basedir'], $thumbfile );
-				$thumbdir  = path_join( $uploadpath['basedir'], dirname( $file ) );
-
-				if ( ! wp_delete_file_from_directory( $thumbfile, $thumbdir ) ) {
-					$deleted = false;
-				}
-			}
+			/** This filter is documented in wp-admin/custom-header.php */
+			$thumbfile = apply_filters( 'wp_delete_file', $thumbfile );
+			@ unlink( path_join($uploadpath['basedir'], $thumbfile) );
 		}
 	}

 	// Remove intermediate and backup images if there are any.
 	if ( isset( $meta['sizes'] ) && is_array( $meta['sizes'] ) ) {
-		$intermediate_dir = path_join( $uploadpath['basedir'], dirname( $file ) );
 		foreach ( $meta['sizes'] as $size => $sizeinfo ) {
 			$intermediate_file = str_replace( basename( $file ), $sizeinfo['file'], $file );
-			if ( ! empty( $intermediate_file ) ) {
-				$intermediate_file = path_join( $uploadpath['basedir'], $intermediate_file );
-
-				if ( ! wp_delete_file_from_directory( $intermediate_file, $intermediate_dir ) ) {
-					$deleted = false;
-				}
-			}
+			/** This filter is documented in wp-admin/custom-header.php */
+			$intermediate_file = apply_filters( 'wp_delete_file', $intermediate_file );
+			@ unlink( path_join( $uploadpath['basedir'], $intermediate_file ) );
 		}
 	}

 	if ( is_array($backup_sizes) ) {
-		$del_dir = path_join( $uploadpath['basedir'], dirname( $meta['file'] ) );
 		foreach ( $backup_sizes as $size ) {
 			$del_file = path_join( dirname($meta['file']), $size['file'] );
-			if ( ! empty( $del_file ) ) {
-				$del_file = path_join( $uploadpath['basedir'], $del_file );
-
-				if ( ! wp_delete_file_from_directory( $del_file, $del_dir ) ) {
-					$deleted = false;
-				}
-			}
+			/** This filter is documented in wp-admin/custom-header.php */
+			$del_file = apply_filters( 'wp_delete_file', $del_file );
+			@ unlink( path_join($uploadpath['basedir'], $del_file) );
 		}
 	}

-	if ( ! wp_delete_file_from_directory( $file, $uploadpath['basedir'] ) ) {
-		$deleted = false;
-	}
+	/** This filter is documented in wp-admin/custom-header.php */
+	$file = apply_filters( 'wp_delete_file', $file );

-	return $deleted;
+	if ( ! empty($file) )
+		@ unlink($file);
+
+	clean_post_cache( $post );
+
+	return $post;
 }

 /**
--- a/wp-includes/query.php
+++ b/wp-includes/query.php
@@ -2910,15 +2910,14 @@ class WP_Query {

 		if ( 'any' == $post_type ) {
 			$in_search_post_types = get_post_types( array('exclude_from_search' => false) );
-			if ( empty( $in_search_post_types ) ) {
+			if ( empty( $in_search_post_types ) )
 				$where .= ' AND 1=0 ';
-			} else {
-				$where .= " AND {$wpdb->posts}.post_type IN ('" . join( "', '", array_map( 'esc_sql', $in_search_post_types ) ) . "')";
-			}
+			else
+				$where .= " AND $wpdb->posts.post_type IN ('" . join("', '", $in_search_post_types ) . "')";
 		} elseif ( !empty( $post_type ) && is_array( $post_type ) ) {
-			$where .= " AND {$wpdb->posts}.post_type IN ('" . join("', '", esc_sql( $post_type ) ) . "')";
+			$where .= " AND $wpdb->posts.post_type IN ('" . join("', '", $post_type) . "')";
 		} elseif ( ! empty( $post_type ) ) {
-			$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_type = %s", $post_type );
+			$where .= " AND $wpdb->posts.post_type = '$post_type'";
 			$post_type_object = get_post_type_object ( $post_type );
 		} elseif ( $this->is_attachment ) {
 			$where .= " AND $wpdb->posts.post_type = 'attachment'";
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -706,9 +706,6 @@ function wp_just_in_time_script_localization() {
 		'blog_id' => get_current_blog_id(),
 	) );

-	wp_localize_script( 'mce-view', 'mceViewL10n', array(
-		'shortcodes' => ! empty( $GLOBALS['shortcode_tags'] ) ? array_keys( $GLOBALS['shortcode_tags'] ) : array()
-	) );
 }

 /**
--- a/wp-includes/taxonomy.php
+++ b/wp-includes/taxonomy.php
@@ -593,7 +593,7 @@ function get_objects_in_term( $term_ids, $taxonomies, $args = array() ) {

 	$term_ids = array_map('intval', $term_ids );

-	$taxonomies = "'" . implode( "', '", array_map( 'esc_sql', $taxonomies ) ) . "'";
+	$taxonomies = "'" . implode( "', '", $taxonomies ) . "'";
 	$term_ids = "'" . implode( "', '", $term_ids ) . "'";

 	$object_ids = $wpdb->get_col("SELECT tr.object_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ($taxonomies) AND tt.term_id IN ($term_ids) ORDER BY tr.object_id $order");
@@ -1735,7 +1735,7 @@ function get_terms( $taxonomies, $args = '' ) {
 		$order = 'ASC';
 	}

-	$where = "tt.taxonomy IN ('" . implode("', '", array_map( 'esc_sql', $taxonomies ) ) . "')";
+	$where = "tt.taxonomy IN ('" . implode("', '", $taxonomies) . "')";

 	$exclude = $args['exclude'];
 	$exclude_tree = $args['exclude_tree'];
@@ -2638,7 +2638,7 @@ function wp_get_object_terms($object_ids, $taxonomies, $args = array()) {
 	if ( '' !== $order && ! in_array( $order, array( 'ASC', 'DESC' ) ) )
 		$order = 'ASC';

-	$taxonomies = "'" . implode("', '", array_map( 'esc_sql', $taxonomies ) ) . "'";
+	$taxonomies = "'" . implode("', '", $taxonomies) . "'";
 	$object_ids = implode(', ', $object_ids);

 	$select_this = '';
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
 *
 * @global string $wp_version
 */
-$wp_version = '4.1.24';
+$wp_version = '4.1.9';

 /**
 * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
--- a/wp-includes/wp-db.php
+++ b/wp-includes/wp-db.php
@@ -1076,22 +1076,19 @@ class wpdb {
 	function _real_escape( $string ) {
 		if ( $this->dbh ) {
 			if ( $this->use_mysqli ) {
-				$escaped = mysqli_real_escape_string( $this->dbh, $string );
+				return mysqli_real_escape_string( $this->dbh, $string );
 			} else {
-				$escaped = mysql_real_escape_string( $string, $this->dbh );
+				return mysql_real_escape_string( $string, $this->dbh );
 			}
-		} else {
-			$class = get_class( $this );
-			if ( function_exists( '__' ) ) {
-				/* translators: %s: database access abstraction class, usually wpdb or a class extending wpdb */
-				_doing_it_wrong( $class, sprintf( __( '%s must set a database connection for use with escaping.' ), $class ), '3.6.0' );
-			} else {
-				_doing_it_wrong( $class, sprintf( '%s must set a database connection for use with escaping.', $class ), '3.6.0' );
-			}
-			$escaped = addslashes( $string );
 		}

-		return $this->add_placeholder_escape( $escaped );
+		$class = get_class( $this );
+		if ( function_exists( '__' ) ) {
+			_doing_it_wrong( $class, sprintf( __( '%s must set a database connection for use with escaping.' ), $class ), E_USER_NOTICE );
+		} else {
+			_doing_it_wrong( $class, sprintf( '%s must set a database connection for use with escaping.', $class ), E_USER_NOTICE );
+		}
+		return addslashes( $string );
 	}

 	/**
@@ -1165,120 +1162,58 @@ class wpdb {
 	/**
 	 * Prepares a SQL query for safe execution. Uses sprintf()-like syntax.
 	 *
-	 * The following placeholders can be used in the query string:
+	 * The following directives can be used in the query format string:
 	 *   %d (integer)
 	 *   %f (float)
 	 *   %s (string)
+	 *   %% (literal percentage sign - no argument needed)
 	 *
-	 * All placeholders MUST be left unquoted in the query string. A corresponding argument MUST be passed for each placeholder.
+	 * All of %d, %f, and %s are to be left unquoted in the query string and they need an argument passed for them.
+	 * Literals (%) as parts of the query must be properly written as %%.
 	 *
-	 * For compatibility with old behavior, numbered or formatted string placeholders (eg, %1$s, %5s) will not have quotes
-	 * added by this function, so should be passed with appropriate quotes around them for your usage.
+	 * This function only supports a small subset of the sprintf syntax; it only supports %d (integer), %f (float), and %s (string).
+	 * Does not support sign, padding, alignment, width or precision specifiers.
+	 * Does not support argument numbering/swapping.
 	 *
-	 * Literal percentage signs (%) in the query string must be written as %%. Percentage wildcards (for example,
-	 * to use in LIKE syntax) must be passed via a substitution argument containing the complete LIKE string, these
-	 * cannot be inserted directly in the query string. Also see {@see esc_like()}.
+	 * May be called like {@link http://php.net/sprintf sprintf()} or like {@link http://php.net/vsprintf vsprintf()}.
 	 *
-	 * Arguments may be passed as individual arguments to the method, or as a single array containing all arguments. A combination
-	 * of the two is not supported.
+	 * Both %d and %s should be left unquoted in the query string.
 	 *
-	 * Examples:
-	 *     $wpdb->prepare( "SELECT * FROM `table` WHERE `column` = %s AND `field` = %d OR `other_field` LIKE %s", array( 'foo', 1337, '%bar' ) );
-	 *     $wpdb->prepare( "SELECT DATE_FORMAT(`field`, '%%c') FROM `table` WHERE `column` = %s", 'foo' );
+	 *     wpdb::prepare( "SELECT * FROM `table` WHERE `column` = %s AND `field` = %d", 'foo', 1337 )
+	 *     wpdb::prepare( "SELECT DATE_FORMAT(`field`, '%%c') FROM `table` WHERE `column` = %s", 'foo' );
 	 *
-	 * @link https://secure.php.net/sprintf Description of syntax.
+	 * @link http://php.net/sprintf Description of syntax.
 	 * @since 2.3.0
 	 *
-	 * @param string      $query    Query statement with sprintf()-like placeholders
-	 * @param array|mixed $args     The array of variables to substitute into the query's placeholders if being called with an array of arguments,
-	 *                              or the first variable to substitute into the query's placeholders if being called with individual arguments.
-	 * @param mixed       $args,... further variables to substitute into the query's placeholders if being called wih individual arguments.
-	 * @return string|void Sanitized query string, if there is a query to prepare.
+	 * @param string $query Query statement with sprintf()-like placeholders
+	 * @param array|mixed $args The array of variables to substitute into the query's placeholders if being called like
+	 * 	{@link http://php.net/vsprintf vsprintf()}, or the first variable to substitute into the query's placeholders if
+	 * 	being called like {@link http://php.net/sprintf sprintf()}.
+	 * @param mixed $args,... further variables to substitute into the query's placeholders if being called like
+	 * 	{@link http://php.net/sprintf sprintf()}.
+	 * @return null|false|string Sanitized query string, null if there is no query, false if there is an error and string
+	 * 	if there was something to prepare
 	 */
 	public function prepare( $query, $args ) {
-		if ( is_null( $query ) ) {
+		if ( is_null( $query ) )
 			return;
-		}

 		// This is not meant to be foolproof -- but it will catch obviously incorrect usage.
 		if ( strpos( $query, '%' ) === false ) {
-			wp_load_translations_early();
-			_doing_it_wrong( 'wpdb::prepare', sprintf( __( 'The query argument of %s must have a placeholder.' ), 'wpdb::prepare()' ), '3.9.0' );
+			_doing_it_wrong( 'wpdb::prepare', sprintf( __( 'The query argument of %s must have a placeholder.' ), 'wpdb::prepare()' ), '3.9' );
 		}

 		$args = func_get_args();
 		array_shift( $args );
-
-		// If args were passed as an array (as in vsprintf), move them up.
-		$passed_as_array = false;
-		if ( is_array( $args[0] ) && count( $args ) == 1 ) {
-			$passed_as_array = true;
+		// If args were passed as an array (as in vsprintf), move them up
+		if ( isset( $args[0] ) && is_array($args[0]) )
 			$args = $args[0];
-		}
-
-		foreach ( $args as $arg ) {
-			if ( ! is_scalar( $arg ) && ! is_null( $arg ) ) {
-				wp_load_translations_early();
-				_doing_it_wrong( 'wpdb::prepare', sprintf( __( 'Unsupported value type (%s).' ), gettype( $arg ) ), '4.8.2' );
-			}
-		}
-
-		/*
-		 * Specify the formatting allowed in a placeholder. The following are allowed:
-		 *
-		 * - Sign specifier. eg, $+d
-		 * - Numbered placeholders. eg, %1$s
-		 * - Padding specifier, including custom padding characters. eg, %05s, %'#5s
-		 * - Alignment specifier. eg, %05-s
-		 * - Precision specifier. eg, %.2f
-		 */
-		$allowed_format = '(?:[1-9][0-9]*[$])?[-+0-9]*(?: |0|\'.)?[-+0-9]*(?:\.[0-9]+)?';
-
-		/*
-		 * If a %s placeholder already has quotes around it, removing the existing quotes and re-inserting them
-		 * ensures the quotes are consistent.
-		 *
-		 * For backwards compatibility, this is only applied to %s, and not to placeholders like %1$s, which are frequently
-		 * used in the middle of longer strings, or as table name placeholders.
-		 */
-		$query = str_replace( "'%s'", '%s', $query ); // Strip any existing single quotes.
-		$query = str_replace( '"%s"', '%s', $query ); // Strip any existing double quotes.
-		$query = preg_replace( '/(?<!%)%s/', "'%s'", $query ); // Quote the strings, avoiding escaped strings like %%s.
-
-		$query = preg_replace( "/(?<!%)(%($allowed_format)?f)/" , '%\\2F', $query ); // Force floats to be locale unaware.
-
-		$query = preg_replace( "/%(?:%|$|(?!($allowed_format)?[sdF]))/", '%%\\1', $query ); // Escape any unescaped percents.
-
-		// Count the number of valid placeholders in the query.
-		$placeholders = preg_match_all( "/(^|[^%]|(%%)+)%($allowed_format)?[sdF]/", $query, $matches );
-
-		if ( count( $args ) !== $placeholders ) {
-			if ( 1 === $placeholders && $passed_as_array ) {
-				// If the passed query only expected one argument, but the wrong number of arguments were sent as an array, bail.
-				wp_load_translations_early();
-				_doing_it_wrong( 'wpdb::prepare', __( 'The query only expected one placeholder, but an array of multiple placeholders was sent.' ), '4.9.0' );
-
-				return;
-			} else {
-				/*
-				 * If we don't have the right number of placeholders, but they were passed as individual arguments,
-				 * or we were expecting multiple arguments in an array, throw a warning.
-				 */
-				wp_load_translations_early();
-				_doing_it_wrong( 'wpdb::prepare',
-					/* translators: 1: number of placeholders, 2: number of arguments passed */
-					sprintf( __( 'The query does not contain the correct number of placeholders (%1$d) for the number of arguments passed (%2$d).' ),
-						$placeholders,
-						count( $args ) ),
-					'4.8.3'
-				);
-			}
-		}
-
+		$query = str_replace( "'%s'", '%s', $query ); // in case someone mistakenly already singlequoted it
+		$query = str_replace( '"%s"', '%s', $query ); // doublequote unquoting
+		$query = preg_replace( '|(?<!%)%f|' , '%F', $query ); // Force floats to be locale unaware
+		$query = preg_replace( '|(?<!%)%s|', "'%s'", $query ); // quote the strings, avoiding escaped strings like %%s
 		array_walk( $args, array( $this, 'escape_by_ref' ) );
-		$query = @vsprintf( $query, $args );
-
-		return $this->add_placeholder_escape( $query );
+		return @vsprintf( $query, $args );
 	}

 	/**
@@ -1793,64 +1728,6 @@ class wpdb {
 		}
 	}

-	/**
-	 * Generates and returns a placeholder escape string for use in queries returned by ::prepare().
-	 *
-	 * @since 4.8.3
-	 *
-	 * @return string String to escape placeholders.
-	 */
-	public function placeholder_escape() {
-		static $placeholder;
-
-		if ( ! $placeholder ) {
-			// If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
-			$algo = function_exists( 'hash' ) ? 'sha256' : 'sha1';
-			// Old WP installs may not have AUTH_SALT defined.
-			$salt = defined( 'AUTH_SALT' ) && AUTH_SALT ? AUTH_SALT : (string) rand();
-
-			$placeholder = '{' . hash_hmac( $algo, uniqid( $salt, true ), $salt ) . '}';
-		}
-
-		/*
-		 * Add the filter to remove the placeholder escaper. Uses priority 0, so that anything
-		 * else attached to this filter will recieve the query with the placeholder string removed.
-		 */
-		if ( ! has_filter( 'query', array( $this, 'remove_placeholder_escape' ) ) ) {
-			add_filter( 'query', array( $this, 'remove_placeholder_escape' ), 0 );
-		}
-
-		return $placeholder;
-	}
-
-	/**
-	 * Adds a placeholder escape string, to escape anything that resembles a printf() placeholder.
-	 *
-	 * @since 4.8.3
-	 *
-	 * @param string $query The query to escape.
-	 * @return string The query with the placeholder escape string inserted where necessary.
-	 */
-	public function add_placeholder_escape( $query ) {
-		/*
-		 * To prevent returning anything that even vaguely resembles a placeholder,
-		 * we clobber every % we can find.
-		 */
-		return str_replace( '%', $this->placeholder_escape(), $query );
-	}
-
-	/**
-	 * Removes the placeholder escape strings from a query.
-	 *
-	 * @since 4.8.3
-	 *
-	 * @param string $query The query from which the placeholder will be removed.
-	 * @return string The query with the placeholder removed.
-	 */
-	public function remove_placeholder_escape( $query ) {
-		return str_replace( $this->placeholder_escape(), '%', $query );
-	}
-
 	/**
 	 * Insert a row into a table.
 	 *
@@ -2786,8 +2663,7 @@ class wpdb {
 					}

 					if ( is_array( $value['length'] ) ) {
-						$length = sprintf( '%.0f', $value['length']['length'] );
-						$queries[ $col ] = $this->prepare( "CONVERT( LEFT( CONVERT( %s USING $charset ), $length ) USING {$this->charset} )", $value['value'] );
+						$queries[ $col ] = $this->prepare( "CONVERT( LEFT( CONVERT( %s USING $charset ), %.0f ) USING {$this->charset} )", $value['value'], $value['length']['length'] );
 					} else if ( 'binary' !== $charset ) {
 						// If we don't have a length, there's no need to convert binary - it will always return the same result.
 						$queries[ $col ] = $this->prepare( "CONVERT( CONVERT( %s USING $charset ) USING {$this->charset} )", $value['value'] );
--- a/wp-login.php
+++ b/wp-login.php
@@ -14,10 +14,10 @@ require( dirname(__FILE__) . '/wp-load.php' );
 // Redirect to https login if forced to use SSL
 if ( force_ssl_admin() && ! is_ssl() ) {
 	if ( 0 === strpos($_SERVER['REQUEST_URI'], 'http') ) {
-		wp_safe_redirect( set_url_scheme( $_SERVER['REQUEST_URI'], 'https' ) );
+		wp_redirect( set_url_scheme( $_SERVER['REQUEST_URI'], 'https' ) );
 		exit();
 	} else {
-		wp_safe_redirect( 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
+		wp_redirect( 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
 		exit();
 	}
 }
--- a/wp-mail.php
+++ b/wp-mail.php
@@ -14,12 +14,6 @@ require(dirname(__FILE__) . '/wp-load.php');
 if ( ! apply_filters( 'enable_post_by_email_configuration', true ) )
 	wp_die( __( 'This action has been disabled by the administrator.' ) );

-$mailserver_url = get_option( 'mailserver_url' );
-
-if ( 'mail.example.com' === $mailserver_url || empty( $mailserver_url ) ) {
-	wp_die( __( 'This action has been disabled by the administrator.' ), 403 );
-}
-
 /**
 * Fires to allow a plugin to do a complete takeover of Post by Email.
 *