WordPress 5.0.20.

Built from https://develop.svn.wordpress.org/branches/5.0@56874


git-svn-id: http://core.svn.wordpress.org/branches/5.0@56385 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/about.php

@@ -62,6 +62,126 @@ include( ABSPATH . 'wp-admin/admin-header.php' );
 
 		<div class="changelog point-releases">
 			<h3><?php _e( 'Maintenance and Security Releases' ); ?></h3>
+			<p>
+				<?php
+				printf(
+					/* translators: %s: WordPress version number */
+					__( '<strong>Version %s</strong> addressed some security issues.' ),
+					'5.0.20'
+				);
+				?>
+				<?php
+				printf(
+					/* translators: %s: HelpHub URL */
+					__( 'For more information, see <a href="%s">the release notes</a>.' ),
+					sprintf(
+						/* translators: %s: WordPress version */
+						esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+						sanitize_title( '5.0.20' )
+					)
+				);
+				?>
+			</p>
+			<p>
+				<?php
+				printf(
+					/* translators: %s: WordPress version number */
+					__( '<strong>Version %s</strong> addressed some security issues.' ),
+					'5.0.19'
+				);
+				?>
+				<?php
+				printf(
+					/* translators: %s: HelpHub URL */
+					__( 'For more information, see <a href="%s">the release notes</a>.' ),
+					sprintf(
+						/* translators: %s: WordPress version */
+						esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+						sanitize_title( '5.0.19' )
+					)
+				);
+				?>
+			</p>
+			<p>
+				<?php
+				printf(
+					/* translators: %s: WordPress version number */
+					__( '<strong>Version %s</strong> addressed some security issues.' ),
+					'5.0.18'
+				);
+				?>
+				<?php
+				printf(
+					/* translators: %s: HelpHub URL */
+					__( 'For more information, see <a href="%s">the release notes</a>.' ),
+					sprintf(
+						/* translators: %s: WordPress version */
+						esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+						sanitize_title( '5.0.18' )
+					)
+				);
+				?>
+			</p>
+			<p>
+				<?php
+				printf(
+					/* translators: %s: WordPress version number */
+					__( '<strong>Version %s</strong> addressed some security issues.' ),
+					'5.0.17'
+				);
+				?>
+				<?php
+				printf(
+					/* translators: %s: HelpHub URL */
+					__( 'For more information, see <a href="%s">the release notes</a>.' ),
+					sprintf(
+						/* translators: %s: WordPress version */
+						esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+						sanitize_title( '5.0.17' )
+					)
+				);
+				?>
+			</p>
+			<p>
+				<?php
+				printf(
+					/* translators: %s: WordPress version number */
+					__( '<strong>Version %s</strong> addressed one security issue.' ),
+					'5.0.16'
+				);
+				?>
+				<?php
+				printf(
+					/* translators: %s: HelpHub URL */
+					__( 'For more information, see <a href="%s">the release notes</a>.' ),
+					sprintf(
+						/* translators: %s: WordPress version */
+						esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+						sanitize_title( '5.0.16' )
+					)
+				);
+				?>
+			</p>
+			<p>
+				<?php
+				printf(
+					/* translators: %s: WordPress version number */
+					__( '<strong>Version %s</strong> addressed some security issues.' ),
+					'5.0.15'
+				);
+				?>
+				<?php
+				printf(
+					/* translators: %s: HelpHub URL */
+					__( 'For more information, see <a href="%s">the release notes</a>.' ),
+					sprintf(
+						/* translators: %s: WordPress version */
+						esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+						sanitize_title( '5.0.15' )
+					)
+				);
+				?>
+			</p>
 			<p>
 				<?php
 				printf(
@@ -823,3 +943,15 @@ _n_noop( '<strong>Version %1$s</strong> addressed some security issues and fixed
 
 /* translators: %s: Codex URL */
 __( 'For more information, see <a href="%s">the release notes</a>.' );
+
+/* translators: 1: WordPress version number, 2: Link to update WordPress */
+__( 'Important! Your version of WordPress (%1$s) is no longer supported, you will not receive any security updates for your website. To keep your site secure, please <a href="%2$s">update to the latest version of WordPress</a>.' );
+
+/* translators: 1: WordPress version number, 2: Link to update WordPress */
+__( 'Important! Your version of WordPress (%1$s) will stop receiving security updates in the near future. To keep your site secure, please <a href="%2$s">update to the latest version of WordPress</a>.' );
+
+/* translators: %s: The major version of WordPress for this branch. */
+__( 'This is the final release of WordPress %s' );
+
+/* translators: The localized WordPress download URL. */
+__( 'https://wordpress.org/download/' );

wp-admin/includes/ajax-actions.php

@@ -2257,6 +2257,10 @@ function wp_ajax_set_attachment_thumbnail() {
 		wp_send_json_error();
 	}
 
+	if ( false === check_ajax_referer( 'set-attachment-thumbnail', '_ajax_nonce', false ) ) {
+		wp_send_json_error();
+	}
+
 	$post_ids = array();
 	// For each URL, try to find its corresponding post ID.
 	foreach ( $_POST['urls'] as $url ) {
@@ -2469,7 +2473,7 @@ function wp_ajax_query_attachments() {
 
 	// Filter query clauses to include filenames.
 	if ( isset( $query['s'] ) ) {
-		add_filter( 'posts_clauses', '_filter_query_attachment_filenames' );
+		add_filter( 'wp_allow_query_attachment_by_filename', '__return_true' );
 	}
 
 	/**
@@ -3134,13 +3138,29 @@ function wp_ajax_parse_media_shortcode() {
 
 	$shortcode = wp_unslash( $_POST['shortcode'] );
 
+	// Only process previews for media related shortcodes:
+	$found_shortcodes = get_shortcode_tags_in_content( $shortcode );
+	$media_shortcodes = array(
+		'audio',
+		'embed',
+		'playlist',
+		'video',
+		'gallery',
+	);
+
+	$other_shortcodes = array_diff( $found_shortcodes, $media_shortcodes );
+
+	if ( ! empty( $other_shortcodes ) ) {
+		wp_send_json_error();
+	}
+
 	if ( ! empty( $_POST['post_ID'] ) ) {
 		$post = get_post( (int) $_POST['post_ID'] );
 	}
 
 	// the embed shortcode requires a post
 	if ( ! $post || ! current_user_can( 'edit_post', $post->ID ) ) {
-		if ( 'embed' === $shortcode ) {
+		if ( in_array( 'embed', $found_shortcodes, true ) ) {
 			wp_send_json_error();
 		}
 	} else {

wp-admin/includes/class-wp-comments-list-table.php

@@ -500,6 +500,19 @@ class WP_Comments_List_Table extends WP_List_Table {
 		}
 		$this->user_can = current_user_can( 'edit_comment', $comment->comment_ID );
 
+		$edit_post_cap = $post ? 'edit_post' : 'edit_posts';
+		if (
+			current_user_can( $edit_post_cap, $comment->comment_post_ID ) ||
+			(
+				empty( $post->post_password ) &&
+				current_user_can( 'read_post', $comment->comment_post_ID )
+			)
+		) {
+			// The user has access to the post
+		} else {
+			return false;
+		}
+
 		echo "<tr id='comment-$comment->comment_ID' class='$the_comment_class'>";
 		$this->single_row_columns( $comment );
 		echo "</tr>\n";

wp-admin/includes/class-wp-list-table.php

@@ -622,7 +622,20 @@ class WP_List_Table {
 		$approved_phrase = sprintf( _n( '%s approved comment', '%s approved comments', $approved_comments ), $approved_comments_number );
 		$pending_phrase = sprintf( _n( '%s pending comment', '%s pending comments', $pending_comments ), $pending_comments_number );
 
-		// No comments at all.
+		$post_object   = get_post( $post_id );
+		$edit_post_cap = $post_object ? 'edit_post' : 'edit_posts';
+		if (
+			current_user_can( $edit_post_cap, $post_id ) ||
+			(
+				empty( $post_object->post_password ) &&
+				current_user_can( 'read_post', $post_id )
+			)
+		) {
+			// The user has access to the post and thus can see comments
+		} else {
+			return false;
+		}
+
 		if ( ! $approved_comments && ! $pending_comments ) {
 			printf( '<span aria-hidden="true">&#8212;</span><span class="screen-reader-text">%s</span>',
 				__( 'No comments' )

wp-admin/includes/dashboard.php

@@ -919,8 +919,18 @@ function wp_dashboard_recent_comments( $total_items = 5 ) {
 		echo '<h3>' . __( 'Recent Comments' ) . '</h3>';
 
 		echo '<ul id="the-comment-list" data-wp-lists="list:comment">';
-		foreach ( $comments as $comment )
-			_wp_dashboard_recent_comments_row( $comment );
+		foreach ( $comments as $comment ) {
+			$comment_post = get_post( $comment->comment_post_ID );
+			if (
+				current_user_can( 'edit_post', $comment->comment_post_ID ) ||
+				(
+					empty( $comment_post->post_password ) &&
+					current_user_can( 'read_post', $comment->comment_post_ID )
+				)
+			) {
+				_wp_dashboard_recent_comments_row( $comment );
+			}
+		}
 		echo '</ul>';
 
 		if ( current_user_can( 'edit_posts' ) ) {

wp-admin/includes/post.php

@@ -1180,7 +1180,7 @@ function wp_edit_attachments_query_vars( $q = false ) {
 
 	// Filter query clauses to include filenames.
 	if ( isset( $q['s'] ) ) {
-		add_filter( 'posts_clauses', '_filter_query_attachment_filenames' );
+		add_filter( 'wp_allow_query_attachment_by_filename', '__return_true' );
 	}
 
 	return $q;

wp-admin/includes/upgrade.php

@@ -1325,8 +1325,8 @@ function upgrade_280() {
 		$start = 0;
 		while( $rows = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options ORDER BY option_id LIMIT $start, 20" ) ) {
 			foreach ( $rows as $row ) {
-				$value = $row->option_value;
-				if ( !@unserialize( $value ) )
+				$value = maybe_unserialize( $row->option_value );
+				if ( $value === $row->option_value )
 					$value = stripslashes( $value );
 				if ( $value !== $row->option_value ) {
 					update_option( $row->option_name, $value );

wp-admin/plugins.php

@@ -455,7 +455,7 @@ if ( ! empty( $invalid ) ) {
 			/* translators: 1: plugin file 2: error message */
 			__( 'The plugin %1$s has been <strong>deactivated</strong> due to an error: %2$s' ),
 			'<code>' . esc_html( $plugin_file ) . '</code>',
-			$error->get_error_message() );
+			esc_html( $error->get_error_message() ) );
 		echo '</p></div>';
 	}
 }
@@ -490,7 +490,7 @@ if ( ! empty( $invalid ) ) {
 		delete_transient( 'plugins_delete_result_' . $user_ID );
 
 		if ( is_wp_error($delete_result) ) : ?>
-		<div id="message" class="error notice is-dismissible"><p><?php printf( __('Plugin could not be deleted due to an error: %s'), $delete_result->get_error_message() ); ?></p></div>
+		<div id="message" class="error notice is-dismissible"><p><?php printf( __('Plugin could not be deleted due to an error: %s'), esc_html( $delete_result->get_error_message() ) ); ?></p></div>
 		<?php else : ?>
 		<div id="message" class="updated notice is-dismissible">
 			<p>

wp-includes/Requests/Hooks.php

@@ -65,4 +65,8 @@ class Requests_Hooks implements Requests_Hooker {
 
 		return true;
 	}
-}
+
+	public function __wakeup() {
+		throw new \LogicException( __CLASS__ . ' should never be unserialized' );
+	}
+}

wp-includes/Requests/IRI.php

@@ -703,6 +703,20 @@ class Requests_IRI {
 		return true;
 	}
 
+	public function __wakeup() {
+		$class_props = get_class_vars( __CLASS__ );
+		$string_props = array( 'scheme', 'iuserinfo', 'ihost', 'port', 'ipath', 'iquery', 'ifragment' );
+		$array_props = array( 'normalization' );
+		foreach ( $class_props as $prop => $default_value ) {
+			if ( in_array( $prop, $string_props, true ) && ! is_string( $this->$prop ) ) {
+				throw new UnexpectedValueException();
+			} elseif ( in_array( $prop, $array_props, true ) && ! is_array( $this->$prop ) ) {
+				throw new UnexpectedValueException();
+			}
+			$this->$prop = null;
+		}
+	}
+
 	/**
 	 * Set the entire IRI. Returns true on success, false on failure (if there
 	 * are any invalid characters).

wp-includes/Requests/Session.php

@@ -227,6 +227,10 @@ class Requests_Session {
 		return Requests::request_multiple($requests, $options);
 	}
 
+	public function __wakeup() {
+		throw new \LogicException( __CLASS__ . ' should never be unserialized' );
+	}
+
 	/**
 	 * Merge a request's data with the default data
 	 *

wp-includes/blocks.php

@@ -271,6 +271,10 @@ function serialize_blocks( $blocks ) {
 function filter_block_content( $text, $allowed_html = 'post', $allowed_protocols = array() ) {
 	$result = '';
 
+	if ( false !== strpos( $text, '<!--' ) && false !== strpos( $text, '--->' ) ) {
+		$text = preg_replace_callback( '%<!--(.*?)--->%', '_filter_block_content_callback', $text );
+	}
+
 	$blocks = parse_blocks( $text );
 	foreach ( $blocks as $block ) {
 		$block   = filter_block_kses( $block, $allowed_html, $allowed_protocols );
@@ -280,6 +284,19 @@ function filter_block_content( $text, $allowed_html = 'post', $allowed_protocols
 	return $result;
 }
 
+/**
+ * Callback used for regular expression replacement in filter_block_content().
+ *
+ * @private
+ * @since 6.2.1
+ *
+ * @param array $matches Array of preg_replace_callback matches.
+ * @return string Replacement string.
+ */
+function _filter_block_content_callback( $matches ) {
+	return '<!--' . rtrim( $matches[1], '-' ) . '-->';
+}
+
 /**
  * Filters and sanitizes a parsed block to remove non-allowable HTML from block
  * attribute values.

wp-includes/bookmark.php

@@ -282,7 +282,7 @@ function get_bookmarks( $args = '' ) {
 	$query .= " $exclusions $inclusions $search";
 	$query .= " ORDER BY $orderby $order";
 	if ( $r['limit'] != -1 ) {
-		$query .= ' LIMIT ' . $r['limit'];
+		$query .= ' LIMIT ' . absint( $r['limit'] );
 	}
 
 	$results = $wpdb->get_results( $query );

wp-includes/class-wp-block-type-registry.php

@@ -154,6 +154,20 @@ final class WP_Block_Type_Registry {
 		return isset( $this->registered_block_types[ $name ] );
 	}
 
+	public function __wakeup() {
+		if ( ! $this->registered_block_types ) {
+			return;
+		}
+		if ( ! is_array( $this->registered_block_types ) ) {
+			throw new UnexpectedValueException();
+		}
+		foreach ( $this->registered_block_types as $value ) {
+			if ( ! $value instanceof WP_Block_Type ) {
+				throw new UnexpectedValueException();
+			}
+		}
+	}
+
 	/**
 	 * Utility method to retrieve the main instance of the class.
 	 *

wp-includes/class-wp-meta-query.php

@@ -695,7 +695,7 @@ class WP_Meta_Query {
 			$clause_compare  = strtoupper( $clause['compare'] );
 			$sibling_compare = strtoupper( $sibling['compare'] );
 			if ( in_array( $clause_compare, $compatible_compares ) && in_array( $sibling_compare, $compatible_compares ) ) {
-				$alias = $sibling['alias'];
+				$alias = preg_replace( '/\W/', '_', $sibling['alias'] );
 				break;
 			}
 		}

wp-includes/class-wp-query.php

@@ -437,6 +437,13 @@ class WP_Query {
 
 	private $compat_methods = array( 'init_query_flags', 'parse_tax_query' );
 
+	/**
+	 * Controls whether an attachment query should include filenames or not.
+	 *
+	 * @since 6.0.3
+	 * @var bool
+	 */
+	protected $allow_query_attachment_by_filename = false;
 	/**
 	 * Resets query flags to false.
 	 *
@@ -1298,7 +1305,12 @@ class WP_Query {
 			}
 
 			$like = $n . $wpdb->esc_like( $term ) . $n;
-			$search .= $wpdb->prepare( "{$searchand}(({$wpdb->posts}.post_title $like_op %s) $andor_op ({$wpdb->posts}.post_excerpt $like_op %s) $andor_op ({$wpdb->posts}.post_content $like_op %s))", $like, $like, $like );
+
+			if ( ! empty( $this->allow_query_attachment_by_filename ) ) {
+				$search .= $wpdb->prepare( "{$searchand}(({$wpdb->posts}.post_title $like_op %s) $andor_op ({$wpdb->posts}.post_excerpt $like_op %s) $andor_op ({$wpdb->posts}.post_content $like_op %s) $andor_op (sq1.meta_value $like_op %s))", $like, $like, $like, $like );
+			} else {
+				$search .= $wpdb->prepare( "{$searchand}(({$wpdb->posts}.post_title $like_op %s) $andor_op ({$wpdb->posts}.post_excerpt $like_op %s) $andor_op ({$wpdb->posts}.post_content $like_op %s))", $like, $like, $like );
+			}
 			$searchand = ' AND ';
 		}
 
@@ -1634,6 +1646,16 @@ class WP_Query {
 		// Fill again in case pre_get_posts unset some vars.
 		$q = $this->fill_query_vars($q);
 
+		/**
+		 * Filters whether an attachment query should include filenames or not.
+		 *
+		 * @since 6.0.3
+		 *
+		 * @param bool $allow_query_attachment_by_filename Whether or not to include filenames.
+		 */
+		$this->allow_query_attachment_by_filename = apply_filters( 'wp_allow_query_attachment_by_filename', false );
+		remove_all_filters( 'wp_allow_query_attachment_by_filename' );
+
 		// Parse meta query
 		$this->meta_query = new WP_Meta_Query();
 		$this->meta_query->parse_query_vars( $q );
@@ -2038,7 +2060,7 @@ class WP_Query {
 			}
 		}
 
-		if ( !empty( $this->tax_query->queries ) || !empty( $this->meta_query->queries ) ) {
+		if ( ! empty( $this->tax_query->queries ) || ! empty( $this->meta_query->queries ) || ! empty( $this->allow_query_attachment_by_filename ) ) {
 			$groupby = "{$wpdb->posts}.ID";
 		}
 
@@ -2111,6 +2133,10 @@ class WP_Query {
 		}
 		$where .= $search . $whichauthor . $whichmimetype;
 
+		if ( ! empty( $this->allow_query_attachment_by_filename ) ) {
+			$join .= " LEFT JOIN {$wpdb->postmeta} AS sq1 ON ( {$wpdb->posts}.ID = sq1.post_id AND sq1.meta_key = '_wp_attached_file' )";
+		}
+
 		if ( ! empty( $this->meta_query->queries ) ) {
 			$clauses = $this->meta_query->get_sql( 'post', $wpdb->posts, 'ID', $this );
 			$join   .= $clauses['join'];

wp-includes/class-wp-tax-query.php

@@ -527,7 +527,7 @@ class WP_Tax_Query {
 
 			// The sibling must both have compatible operator to share its alias.
 			if ( in_array( strtoupper( $sibling['operator'] ), $compatible_operators ) ) {
-				$alias = $sibling['alias'];
+				$alias = preg_replace( '/\W/', '_', $sibling['alias'] );
 				break;
 			}
 		}
@@ -556,7 +556,11 @@ class WP_Tax_Query {
 			return;
 		}
 
-		$query['terms'] = array_unique( (array) $query['terms'] );
+		if ( 'slug' === $query['field'] || 'name' === $query['field'] ) {
+			$query['terms'] = array_unique( (array) $query['terms'] );
+		} else {
+			$query['terms'] = wp_parse_id_list( $query['terms'] );
+		}
 
 		if ( is_taxonomy_hierarchical( $query['taxonomy'] ) && $query['include_children'] ) {
 			$this->transform_query( $query, 'term_id' );

wp-includes/class-wp-theme.php

@@ -535,6 +535,28 @@ final class WP_Theme implements ArrayAccess {
 		return isset( $this->parent ) ? $this->parent : false;
 	}
 
+	/**
+	 * Perform reinitialization tasks.
+	 *
+	 * Prevents a callback from being injected during unserialization of an object.
+	 *
+	 * @return void
+	 */
+	public function __wakeup() {
+		if ( $this->parent && ! $this->parent instanceof self ) {
+			throw new UnexpectedValueException();
+		}
+		if ( $this->headers && ! is_array( $this->headers ) ) {
+			throw new UnexpectedValueException();
+		}
+		foreach ( $this->headers as $value ) {
+			if ( ! is_string( $value ) ) {
+				throw new UnexpectedValueException();
+			}
+		}
+		$this->headers_sanitized = array();
+	}
+
 	/**
 	 * Adds theme data to cache.
 	 *
@@ -1487,4 +1509,16 @@ final class WP_Theme implements ArrayAccess {
 		// Don't mark up; Do translate.
 		return strnatcasecmp( $a->display( 'Name', false, true ), $b->display( 'Name', false, true ) );
 	}
+
+	private static function _check_headers_property_has_correct_type( $headers ) {
+		if ( ! is_array( $headers ) ) {
+			return false;
+		}
+		foreach ( $headers as $key => $value ) {
+			if ( ! is_string( $key ) || ! is_string( $value ) ) {
+				return false;
+			}
+		}
+		return true;
+	}
 }

wp-includes/comment.php

@@ -2183,6 +2183,15 @@ function wp_update_comment($commentarr) {
 		return 0;
 	}
 
+	$filter_comment = false;
+	if ( ! has_filter( 'pre_comment_content', 'wp_filter_kses' ) ) {
+		$filter_comment = ! user_can( isset( $comment['user_id'] ) ? $comment['user_id'] : 0, 'unfiltered_html' );
+	}
+
+	if ( $filter_comment ) {
+		add_filter( 'pre_comment_content', 'wp_filter_kses' );
+	}
+
 	// Escape data pulled from DB.
 	$comment = wp_slash($comment);
 
@@ -2193,6 +2202,10 @@ function wp_update_comment($commentarr) {
 
 	$commentarr = wp_filter_comment( $commentarr );
 
+	if ( $filter_comment ) {
+		remove_filter( 'pre_comment_content', 'wp_filter_kses' );
+	}
+
 	// Now extract the merged array.
 	$data = wp_unslash( $commentarr );
 

wp-includes/customize/class-wp-customize-header-image-control.php

@@ -103,10 +103,10 @@ class WP_Customize_Header_Image_Control extends WP_Customize_Image_Control {
 			<# } else { #>
 
 			<button type="button" class="choice thumbnail"
-				data-customize-image-value="{{{data.header.url}}}"
+				data-customize-image-value="{{data.header.url}}"
 				data-customize-header-image-data="{{JSON.stringify(data.header)}}">
 				<span class="screen-reader-text"><?php _e( 'Set image' ); ?></span>
-				<img src="{{{data.header.thumbnail_url}}}" alt="{{{data.header.alt_text || data.header.description}}}">
+				<img src="{{data.header.thumbnail_url}}" alt="{{data.header.alt_text || data.header.description}}" />
 			</button>
 
 			<# if ( data.type === 'uploaded' ) { #>

wp-includes/customize/class-wp-customize-site-icon-control.php

@@ -66,7 +66,7 @@ class WP_Customize_Site_Icon_Control extends WP_Customize_Cropped_Image_Control
 							<div class="favicon">
 								<img src="{{ data.attachment.sizes.full ? data.attachment.sizes.full.url : data.attachment.url }}" alt="<?php esc_attr_e( 'Preview as a browser icon' ); ?>"/>
 							</div>
-							<span class="browser-title" aria-hidden="true"><?php bloginfo( 'name' ); ?></span>
+							<span class="browser-title" aria-hidden="true"><?php echo esc_js( get_bloginfo( 'name' ) ); ?></span>
 						</div>
 						<img class="app-icon-preview" src="{{ data.attachment.sizes.full ? data.attachment.sizes.full.url : data.attachment.url }}" alt="<?php esc_attr_e( 'Preview as an app icon' ); ?>"/>
 					</div>

wp-includes/date.php

@@ -145,8 +145,8 @@ class WP_Date_Query {
 	 *                              'comment_date', 'comment_date_gmt'.
 	 */
 	public function __construct( $date_query, $default_column = 'post_date' ) {
-		if ( isset( $date_query['relation'] ) && 'OR' === strtoupper( $date_query['relation'] ) ) {
-			$this->relation = 'OR';
+		if ( isset( $date_query['relation'] ) ) {
+			$this->relation = $this->sanitize_relation( $date_query['relation'] );
 		} else {
 			$this->relation = 'AND';
 		}
@@ -225,6 +225,9 @@ class WP_Date_Query {
 			$this->validate_date_values( $queries );
 		}
 
+		// Sanitize the relation parameter.
+		$queries['relation'] = $this->sanitize_relation( $queries['relation'] );
+
 		foreach ( $queries as $key => $q ) {
 			if ( ! is_array( $q ) || in_array( $key, $this->time_keys, true ) ) {
 				// This is a first-order query. Trust the values and sanitize when building SQL.
@@ -998,4 +1001,20 @@ class WP_Date_Query {
 
 		return $wpdb->prepare( "DATE_FORMAT( $column, %s ) $compare %f", $format, $time );
 	}
+
+	/**
+	 * Sanitizes a 'relation' operator.
+	 *
+	 * @since 6.0.3
+	 *
+	 * @param string $relation Raw relation key from the query argument.
+	 * @return string Sanitized relation ('AND' or 'OR').
+	 */
+	public function sanitize_relation( $relation ) {
+		if ( 'OR' === strtoupper( $relation ) ) {
+			return 'OR';
+		} else {
+			return 'AND';
+		}
+	}
 }

wp-includes/deprecated.php

@@ -3952,3 +3952,21 @@ function wp_ajax_press_this_add_category() {
 		wp_send_json_error( array( 'errorMessage' => __( 'The Press This plugin is required.' ) ) );
 	}
 }
+
+/**
+ * Filter the SQL clauses of an attachment query to include filenames.
+ *
+ * @since 4.7.0
+ * @deprecated 6.0.3
+ * @access private
+ *
+ * @param array $clauses An array including WHERE, GROUP BY, JOIN, ORDER BY,
+ *                       DISTINCT, fields (SELECT), and LIMITS clauses.
+ * @return array The unmodified clauses.
+ */
+function _filter_query_attachment_filenames( $clauses ) {
+	_deprecated_function( __FUNCTION__, '6.0.3', 'add_filter( "wp_allow_query_attachment_by_filename", "__return_true" )');
+	remove_filter( 'posts_clauses', __FUNCTION__ );
+	return $clauses;
+}
+

wp-includes/embed.php

@@ -450,7 +450,7 @@ function get_post_embed_html( $width, $height, $post = null ) {
 		 * and edit wp-embed.js directly.
 		 */
 		$output .=<<<JS
-		!function(c,d){"use strict";var e=!1,n=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},!c.wp.receiveEmbedMessage)if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(t)if(t.secret||t.message||t.value)if(!/[^a-zA-Z0-9]/.test(t.secret)){for(var r,a,i,s=d.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=d.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=0;o<n.length;o++)n[o].style.display="none";for(o=0;o<s.length;o++)if(r=s[o],e.source===r.contentWindow){if(r.removeAttribute("style"),"height"===t.message){if(1e3<(i=parseInt(t.value,10)))i=1e3;else if(~~i<200)i=200;r.height=i}if("link"===t.message)if(a=d.createElement("a"),i=d.createElement("a"),a.href=r.getAttribute("src"),i.href=t.value,i.host===a.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),d.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(!n){n=!0;for(var e,t,r=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=d.querySelectorAll("iframe.wp-embedded-content"),s=0;s<i.length;s++){if(!(e=i[s]).getAttribute("data-secret"))t=Math.random().toString(36).substr(2,10),e.src+="#?secret="+t,e.setAttribute("data-secret",t);if(r||a)(t=e.cloneNode(!0)).removeAttribute("security"),e.parentNode.replaceChild(t,e)}}}}(window,document);
+		!function(d,l){"use strict";var e=!1,n=!1;if(l.querySelector)if(d.addEventListener)e=!0;if(d.wp=d.wp||{},!d.wp.receiveEmbedMessage)if(d.wp.receiveEmbedMessage=function(e){var t=e.data;if(t)if(t.secret||t.message||t.value)if(!/[^a-zA-Z0-9]/.test(t.secret)){for(var r,i,a,s=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=new RegExp("^https?:$","i"),c=0;c<n.length;c++)n[c].style.display="none";for(c=0;c<s.length;c++)if(r=s[c],e.source===r.contentWindow){if(r.removeAttribute("style"),"height"===t.message){if(1e3<(a=parseInt(t.value,10)))a=1e3;else if(~~a<200)a=200;r.height=a}if("link"===t.message)if(i=l.createElement("a"),a=l.createElement("a"),i.href=r.getAttribute("src"),a.href=t.value,o.test(a.protocol))if(a.host===i.host)if(l.activeElement===r)d.top.location.href=t.value}}},e)d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",t,!1),d.addEventListener("load",t,!1);function t(){if(!n){n=!0;for(var e,t,r=-1!==navigator.appVersion.indexOf("MSIE 10"),i=!!navigator.userAgent.match(/Trident.*rv:11\./),a=l.querySelectorAll("iframe.wp-embedded-content"),s=0;s<a.length;s++){if(!(e=a[s]).getAttribute("data-secret"))t=Math.random().toString(36).substr(2,10),e.src+="#?secret="+t,e.setAttribute("data-secret",t);if(r||i)(t=e.cloneNode(!0)).removeAttribute("security"),e.parentNode.replaceChild(t,e)}}}}(window,document);
 JS;
 	}
 	$output .= "\n//--><!]]>";

wp-includes/formatting.php

@@ -1084,12 +1084,14 @@ function wp_check_invalid_utf8( $string, $strip = false ) {
  * Encode the Unicode values to be used in the URI.
  *
  * @since 1.5.0
+ * @since 5.8.3 Added the `encode_ascii_characters` parameter.
  *
- * @param string $utf8_string
- * @param int    $length Max  length of the string
+ * @param string $utf8_string             String to encode.
+ * @param int    $length                  Max length of the string
+ * @param bool   $encode_ascii_characters Whether to encode ascii characters such as < " '
  * @return string String with Unicode encoded for URI.
  */
-function utf8_uri_encode( $utf8_string, $length = 0 ) {
+function utf8_uri_encode( $utf8_string, $length = 0, $encode_ascii_characters = false ) {
 	$unicode        = '';
 	$values         = array();
 	$num_octets     = 1;
@@ -1104,11 +1106,14 @@ function utf8_uri_encode( $utf8_string, $length = 0 ) {
 		$value = ord( $utf8_string[ $i ] );
 
 		if ( $value < 128 ) {
-			if ( $length && ( $unicode_length >= $length ) ) {
+			$char                = chr( $value );
+			$encoded_char        = $encode_ascii_characters ? rawurlencode( $char ) : $char;
+			$encoded_char_length = strlen( $encoded_char );
+			if ( $length && ( $unicode_length + $encoded_char_length ) > $length ) {
 				break;
 			}
-			$unicode .= chr( $value );
-			$unicode_length++;
+			$unicode        .= $encoded_char;
+			$unicode_length += $encoded_char_length;
 		} else {
 			if ( count( $values ) == 0 ) {
 				if ( $value < 224 ) {
@@ -2110,6 +2115,29 @@ function sanitize_html_class( $class, $fallback = '' ) {
 	return apply_filters( 'sanitize_html_class', $sanitized, $class, $fallback );
 }
 
+/**
+ * Strips out all characters not allowed in a locale name.
+ *
+ * @since 6.2.1
+ *
+ * @param string $locale_name The locale name to be sanitized.
+ * @return string The sanitized value.
+ */
+function sanitize_locale_name( $locale_name ) {
+	// Limit to A-Z, a-z, 0-9, '_', '-'.
+	$sanitized = preg_replace( '/[^A-Za-z0-9_-]/', '', $locale_name );
+
+	/**
+	 * Filters a sanitized locale name string.
+	 *
+	 * @since 6.2.1
+	 *
+	 * @param string $sanitized   The sanitized locale name.
+	 * @param string $locale_name The locale name before sanitization.
+	 */
+	return apply_filters( 'sanitize_locale_name', $sanitized, $locale_name );
+}
+
 /**
  * Converts lone & characters into `&#038;` (a.k.a. `&amp;`)
  *

wp-includes/functions.php

@@ -656,11 +656,11 @@ function wp_get_http_headers( $url, $deprecated = false ) {
 /**
  * Determines whether the publish date of the current post in the loop is different
  * from the publish date of the previous post in the loop.
- * 
+ *
  * For more information on this and similar theme functions, check out
- * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ 
+ * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
- * 
+ *
  * @since 0.71
  *
  * @global string $currentday  The day of the current post in the loop.
@@ -1351,9 +1351,9 @@ function do_robots() {
  * cache, and the database goes away, then you might have problems.
  *
  * Checks for the 'siteurl' option for whether WordPress is installed.
- * 
+ *
  * For more information on this and similar theme functions, check out
- * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ 
+ * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 2.1.0
@@ -2412,7 +2412,7 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 		} else {
 			if ( $type !== $real_mime ) {
 				/*
-				 * Everything else including image/* and application/*: 
+				 * Everything else including image/* and application/*:
 				 * If the real content type doesn't match the file extension, assume it's dangerous.
 				 */
 				$type = $ext = false;
@@ -2421,7 +2421,7 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 		}
 	}
 
-	// The mime type must be allowed 
+	// The mime type must be allowed
 	if ( $type ) {
 		$allowed = get_allowed_mime_types();
 
@@ -2695,9 +2695,12 @@ function wp_nonce_ays( $action ) {
 	} else {
 		$html = __( 'The link you followed has expired.' );
 		if ( wp_get_referer() ) {
-			$html .= '</p><p>';
-			$html .= sprintf( '<a href="%s">%s</a>',
-				esc_url( remove_query_arg( 'updated', wp_get_referer() ) ),
+			$wp_http_referer = remove_query_arg( 'updated', wp_get_referer() );
+			$wp_http_referer = wp_validate_redirect( esc_url_raw( $wp_http_referer ) );
+			$html           .= '</p><p>';
+			$html           .= sprintf(
+				'<a href="%s">%s</a>',
+				esc_url( $wp_http_referer ),
 				__( 'Please try again.' )
 			);
 		}

wp-includes/js/jquery/jquery.query.js

@@ -5,7 +5,7 @@
  * Date: 2009/8/13
  *
  * @author Blair Mitchelmore
- * @version 2.1.7
+ * @version 2.2.3
  *
  **/
-new function(e){var d=e.separator||"&";var c=e.spaces===false?false:true;var a=e.suffix===false?"":"[]";var g=e.prefix===false?false:true;var b=g?e.hash===true?"#":"?":"";var f=e.numbers===false?false:true;jQuery.query=new function(){var h=function(m,l){return m!=undefined&&m!==null&&(!!l?m.constructor==l:true)};var i=function(r){var l,q=/\[([^[]*)\]/g,n=/^([^[]+)(\[.*\])?$/.exec(r),o=n[1],p=[];while(l=q.exec(n[2])){p.push(l[1])}return[o,p]};var k=function(s,r,q){var t,p=r.shift();if(typeof s!="object"){s=null}if(p===""){if(!s){s=[]}if(h(s,Array)){s.push(r.length==0?q:k(null,r.slice(0),q))}else{if(h(s,Object)){var n=0;while(s[n++]!=null){}s[--n]=r.length==0?q:k(s[n],r.slice(0),q)}else{s=[];s.push(r.length==0?q:k(null,r.slice(0),q))}}}else{if(p&&p.match(/^\s*[0-9]+\s*$/)){var m=parseInt(p,10);if(!s){s=[]}s[m]=r.length==0?q:k(s[m],r.slice(0),q)}else{if(p){var m=p.replace(/^\s*|\s*$/g,"");if(!s){s={}}if(h(s,Array)){var l={};for(var n=0;n<s.length;++n){l[n]=s[n]}s=l}s[m]=r.length==0?q:k(s[m],r.slice(0),q)}else{return q}}}return s};var j=function(l){var m=this;m.keys={};if(l.queryObject){jQuery.each(l.get(),function(n,o){m.SET(n,o)})}else{jQuery.each(arguments,function(){var n=""+this;n=n.replace(/^[?#]/,"");n=n.replace(/[;&]$/,"");if(c){n=n.replace(/[+]/g," ")}jQuery.each(n.split(/[&;]/),function(){var o=decodeURIComponent(this.split("=")[0]||"");var p=decodeURIComponent(this.split("=")[1]||"");if(!o){return}if(f){if(/^[+-]?[0-9]+\.[0-9]*$/.test(p)){p=parseFloat(p)}else{if(/^[+-]?[0-9]+$/.test(p)){p=parseInt(p,10)}}}p=(!p&&p!==0)?true:p;if(p!==false&&p!==true&&typeof p!="number"){p=p}m.SET(o,p)})})}return m};j.prototype={queryObject:true,has:function(l,m){var n=this.get(l);return h(n,m)},GET:function(m){if(!h(m)){return this.keys}var l=i(m),n=l[0],p=l[1];var o=this.keys[n];while(o!=null&&p.length!=0){o=o[p.shift()]}return typeof o=="number"?o:o||""},get:function(l){var m=this.GET(l);if(h(m,Object)){return jQuery.extend(true,{},m)}else{if(h(m,Array)){return m.slice(0)}}return m},SET:function(m,r){var o=!h(r)?null:r;var l=i(m),n=l[0],q=l[1];var p=this.keys[n];this.keys[n]=k(p,q.slice(0),o);return this},set:function(l,m){return this.copy().SET(l,m)},REMOVE:function(l){return this.SET(l,null).COMPACT()},remove:function(l){return this.copy().REMOVE(l)},EMPTY:function(){var l=this;jQuery.each(l.keys,function(m,n){delete l.keys[m]});return l},load:function(l){var n=l.replace(/^.*?[#](.+?)(?:\?.+)?$/,"$1");var m=l.replace(/^.*?[?](.+?)(?:#.+)?$/,"$1");return new j(l.length==m.length?"":m,l.length==n.length?"":n)},empty:function(){return this.copy().EMPTY()},copy:function(){return new j(this)},COMPACT:function(){function l(o){var n=typeof o=="object"?h(o,Array)?[]:{}:o;if(typeof o=="object"){function m(r,p,q){if(h(r,Array)){r.push(q)}else{r[p]=q}}jQuery.each(o,function(p,q){if(!h(q)){return true}m(n,p,l(q))})}return n}this.keys=l(this.keys);return this},compact:function(){return this.copy().COMPACT()},toString:function(){var n=0,r=[],q=[],m=this;var o=function(s){s=s+"";if(c){s=s.replace(/ /g,"+")}return encodeURIComponent(s)};var l=function(s,t,u){if(!h(u)||u===false){return}var v=[o(t)];if(u!==true){v.push("=");v.push(o(u))}s.push(v.join(""))};var p=function(t,s){var u=function(v){return !s||s==""?[v].join(""):[s,"[",v,"]"].join("")};jQuery.each(t,function(v,w){if(typeof w=="object"){p(w,u(v))}else{l(q,u(v),w)}})};p(this.keys);if(q.length>0){r.push(b)}r.push(q.join(d));return r.join("")}};return new j(location.search,location.hash)}}(jQuery.query||{});
+!function(e){var t=e.separator||"&",l=!1!==e.spaces,n=(e.suffix,!1!==e.prefix?!0===e.hash?"#":"?":""),i=!1!==e.numbers;jQuery.query=new function(){function c(e,t){return null!=e&&null!==e&&(!t||e.constructor==t)}function u(e){for(var t,n=/\[([^[]*)\]/g,r=/^([^[]+)(\[.*\])?$/.exec(e),e=r[1],u=[];t=n.exec(r[2]);)u.push(t[1]);return[e,u]}function o(e,t,n){var r=t.shift();if("object"!=typeof e&&(e=null),""===r)if(c(e=e||[],Array))e.push(0==t.length?n:o(null,t.slice(0),n));else if(c(e,Object)){for(var u=0;null!=e[u++];);e[--u]=0==t.length?n:o(e[u],t.slice(0),n)}else(e=[]).push(0==t.length?n:o(null,t.slice(0),n));else if(r&&r.match(/^\s*[0-9]+\s*$/))(e=e||[])[i=parseInt(r,10)]=0==t.length?n:o(e[i],t.slice(0),n);else{if(!r)return n;var i=r.replace(/^\s*|\s*$/g,"");if(c(e=e||{},Array)){for(var s={},u=0;u<e.length;++u)s[u]=e[u];e=s}e[i]=0==t.length?n:o(e[i],t.slice(0),n)}return e}function r(e){var n=this;return n.keys={},e.queryObject?jQuery.each(e.get(),function(e,t){n.SET(e,t)}):n.parseNew.apply(n,arguments),n}return r.prototype={queryObject:!0,parseNew:function(){var n=this;return n.keys={},jQuery.each(arguments,function(){var e=""+this;e=(e=e.replace(/^[?#]/,"")).replace(/[;&]$/,""),l&&(e=e.replace(/[+]/g," ")),jQuery.each(e.split(/[&;]/),function(){var e=decodeURIComponent(this.split("=")[0]||""),t=decodeURIComponent(this.split("=")[1]||"");e&&(i&&(/^[+-]?[0-9]+\.[0-9]*$/.test(t)?t=parseFloat(t):/^[+-]?[1-9][0-9]*$/.test(t)&&(t=parseInt(t,10))),n.SET(e,t=!t&&0!==t||t))})}),n},has:function(e,t){e=this.get(e);return c(e,t)},GET:function(e){if(!c(e))return this.keys;for(var e=u(e),t=e[0],n=e[1],r=this.keys[t];null!=r&&0!=n.length;)r=r[n.shift()];return"number"==typeof r?r:r||""},get:function(e){e=this.GET(e);return c(e,Object)?jQuery.extend(!0,{},e):c(e,Array)?e.slice(0):e},SET:function(e,t){var n,r;return e.includes("__proto__")||e.includes("constructor")||e.includes("prototype")||(t=c(t)?t:null,n=(e=u(e))[0],e=e[1],r=this.keys[n],this.keys[n]=o(r,e.slice(0),t)),this},set:function(e,t){return this.copy().SET(e,t)},REMOVE:function(e,t){if(t){var n=this.GET(e);if(c(n,Array)){for(tval in n)n[tval]=n[tval].toString();var r=$.inArray(t,n);if(!(0<=r))return;e=(e=n.splice(r,1))[r]}else if(t!=n)return}return this.SET(e,null).COMPACT()},remove:function(e,t){return this.copy().REMOVE(e,t)},EMPTY:function(){var n=this;return jQuery.each(n.keys,function(e,t){delete n.keys[e]}),n},load:function(e){var t=e.replace(/^.*?[#](.+?)(?:\?.+)?$/,"$1"),n=e.replace(/^.*?[?](.+?)(?:#.+)?$/,"$1");return new r(e.length==n.length?"":n,e.length==t.length?"":t)},empty:function(){return this.copy().EMPTY()},copy:function(){return new r(this)},COMPACT:function(){return this.keys=function r(e){var u="object"==typeof e?c(e,Array)?[]:{}:e;return"object"==typeof e&&jQuery.each(e,function(e,t){if(!c(t))return!0;var n;n=u,t=r(t),c(n,Array)?n.push(t):n[e]=t}),u}(this.keys),this},compact:function(){return this.copy().COMPACT()},toString:function(){function u(e,t){function r(e){return(t&&""!=t?[t,"[",e,"]"]:[e]).join("")}jQuery.each(e,function(e,t){var n;"object"==typeof t?u(t,r(e)):(n=i,e=r(e),c(t=t)&&!1!==t&&(e=[s(e)],!0!==t&&(e.push("="),e.push(s(t))),n.push(e.join(""))))})}var e=[],i=[],s=function(e){return e+="",e=encodeURIComponent(e),e=l?e.replace(/%20/g,"+"):e};return u(this.keys),0<i.length&&e.push(n),e.push(i.join(t)),e.join("")}},new r(location.search,location.hash)}}(jQuery.query||{});

wp-includes/js/media-audiovideo.js

@@ -826,6 +826,7 @@ VideoDetails = MediaDetails.extend(/** @lends wp.media.view.MediaFrame.VideoDeta
 
 			wp.ajax.send( 'set-attachment-thumbnail', {
 				data : {
+					_ajax_nonce: wp.media.view.settings.nonce.setAttachmentThumbnail,
 					urls: urls,
 					thumbnail_id: attachment.get( 'id' )
 				}

wp-includes/js/wp-embed.js

@@ -43,6 +43,7 @@
 
 		var iframes = document.querySelectorAll( 'iframe[data-secret="' + data.secret + '"]' ),
 			blockquotes = document.querySelectorAll( 'blockquote[data-secret="' + data.secret + '"]' ),
+			allowedProtocols = new RegExp( '^https?:$', 'i' ),
 			i, source, height, sourceURL, targetURL;
 
 		for ( i = 0; i < blockquotes.length; i++ ) {
@@ -78,6 +79,11 @@
 				sourceURL.href = source.getAttribute( 'src' );
 				targetURL.href = data.value;
 
+				/* Only follow link if the protocol is in the allow list. */
+				if ( ! allowedProtocols.test( targetURL.protocol ) ) {
+					continue;
+				}
+
 				/* Only continue if link hostname matches iframe's hostname. */
 				if ( targetURL.host === sourceURL.host ) {
 					if ( document.activeElement === source ) {

wp-includes/js/wp-embed.min.js

@@ -1 +1 @@
-!function(c,d){"use strict";var e=!1,n=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},!c.wp.receiveEmbedMessage)if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(t)if(t.secret||t.message||t.value)if(!/[^a-zA-Z0-9]/.test(t.secret)){for(var r,a,i,s=d.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=d.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=0;o<n.length;o++)n[o].style.display="none";for(o=0;o<s.length;o++)if(r=s[o],e.source===r.contentWindow){if(r.removeAttribute("style"),"height"===t.message){if(1e3<(i=parseInt(t.value,10)))i=1e3;else if(~~i<200)i=200;r.height=i}if("link"===t.message)if(a=d.createElement("a"),i=d.createElement("a"),a.href=r.getAttribute("src"),i.href=t.value,i.host===a.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),d.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(!n){n=!0;for(var e,t,r=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=d.querySelectorAll("iframe.wp-embedded-content"),s=0;s<i.length;s++){if(!(e=i[s]).getAttribute("data-secret"))t=Math.random().toString(36).substr(2,10),e.src+="#?secret="+t,e.setAttribute("data-secret",t);if(r||a)(t=e.cloneNode(!0)).removeAttribute("security"),e.parentNode.replaceChild(t,e)}}}}(window,document);
+!function(d,l){"use strict";var e=!1,n=!1;if(l.querySelector)if(d.addEventListener)e=!0;if(d.wp=d.wp||{},!d.wp.receiveEmbedMessage)if(d.wp.receiveEmbedMessage=function(e){var t=e.data;if(t)if(t.secret||t.message||t.value)if(!/[^a-zA-Z0-9]/.test(t.secret)){for(var r,i,a,s=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=new RegExp("^https?:$","i"),c=0;c<n.length;c++)n[c].style.display="none";for(c=0;c<s.length;c++)if(r=s[c],e.source===r.contentWindow){if(r.removeAttribute("style"),"height"===t.message){if(1e3<(a=parseInt(t.value,10)))a=1e3;else if(~~a<200)a=200;r.height=a}if("link"===t.message)if(i=l.createElement("a"),a=l.createElement("a"),i.href=r.getAttribute("src"),a.href=t.value,o.test(a.protocol))if(a.host===i.host)if(l.activeElement===r)d.top.location.href=t.value}}},e)d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",t,!1),d.addEventListener("load",t,!1);function t(){if(!n){n=!0;for(var e,t,r=-1!==navigator.appVersion.indexOf("MSIE 10"),i=!!navigator.userAgent.match(/Trident.*rv:11\./),a=l.querySelectorAll("iframe.wp-embedded-content"),s=0;s<a.length;s++){if(!(e=a[s]).getAttribute("data-secret"))t=Math.random().toString(36).substr(2,10),e.src+="#?secret="+t,e.setAttribute("data-secret",t);if(r||i)(t=e.cloneNode(!0)).removeAttribute("security"),e.parentNode.replaceChild(t,e)}}}}(window,document);

wp-includes/l10n.php

@@ -139,7 +139,7 @@ function determine_locale() {
 	}
 
 	if ( ! empty( $_GET['wp_lang'] ) && ! empty( $GLOBALS['pagenow'] ) && 'wp-login.php' === $GLOBALS['pagenow'] ) {
-		$determined_locale = sanitize_text_field( $_GET['wp_lang'] );
+		$determined_locale = sanitize_locale_name( wp_unslash( $_GET['wp_lang'] ) );
 	}
 
 	/**

wp-includes/media-template.php

@@ -1251,7 +1251,7 @@ function wp_print_media_templates() {
 			<div class="favicon">
 				<img id="preview-favicon" src="{{ data.url }}" alt="<?php esc_attr_e( 'Preview as a browser icon' ); ?>"/>
 			</div>
-			<span class="browser-title" aria-hidden="true"><?php bloginfo( 'name' ); ?></span>
+			<span class="browser-title" aria-hidden="true"><?php echo esc_js( get_bloginfo( 'name' ) ); ?></span>
 		</div>
 
 		<strong aria-hidden="true"><?php _e( 'As an app icon' ); ?></strong>

wp-includes/media.php

@@ -1687,11 +1687,24 @@ function gallery_shortcode( $attr ) {
 			$attachments[$val->ID] = $_attachments[$key];
 		}
 	} elseif ( ! empty( $atts['exclude'] ) ) {
+		$post_parent_id = $id;
 		$attachments = get_children( array( 'post_parent' => $id, 'exclude' => $atts['exclude'], 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $atts['order'], 'orderby' => $atts['orderby'] ) );
 	} else {
+		$post_parent_id = $id;
 		$attachments = get_children( array( 'post_parent' => $id, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $atts['order'], 'orderby' => $atts['orderby'] ) );
 	}
 
+	if ( ! empty( $post_parent_id ) ) {
+		$post_parent = get_post( $post_parent_id );
+
+		// terminate the shortcode execution if user cannot read the post or password-protected
+		if (
+		( ! is_post_publicly_viewable( $post_parent->ID ) && ! current_user_can( 'read_post', $post_parent->ID ) )
+		|| post_password_required( $post_parent ) ) {
+			return '';
+		}
+	}
+
 	if ( empty( $attachments ) ) {
 		return '';
 	}
@@ -1991,6 +2004,15 @@ function wp_playlist_shortcode( $attr ) {
 		$attachments = get_children( $args );
 	}
 
+	if ( ! empty( $args['post_parent'] ) ) {
+		$post_parent = get_post( $id );
+
+		// terminate the shortcode execution if user cannot read the post or password-protected
+		if ( ! current_user_can( 'read_post', $post_parent->ID ) || post_password_required( $post_parent ) ) {
+			return '';
+		}
+	}
+
 	if ( empty( $attachments ) ) {
 		return '';
 	}
@@ -3442,7 +3464,8 @@ function wp_enqueue_media( $args = array() ) {
 		/** This filter is documented in wp-admin/includes/media.php */
 		'captions'  => ! apply_filters( 'disable_captions', '' ),
 		'nonce'     => array(
-			'sendToEditor' => wp_create_nonce( 'media-send-to-editor' ),
+			'sendToEditor'           => wp_create_nonce( 'media-send-to-editor' ),
+			'setAttachmentThumbnail' => wp_create_nonce( 'set-attachment-thumbnail' ),
 		),
 		'post'    => array(
 			'id' => 0,

wp-includes/pluggable.php

@@ -312,6 +312,8 @@ function wp_mail( $to, $subject, $message, $headers = '', $attachments = array()
 	$phpmailer->clearAttachments();
 	$phpmailer->clearCustomHeaders();
 	$phpmailer->clearReplyTos();
+	$phpmailer->Body    = '';
+	$phpmailer->AltBody = '';
 
 	// From email and name
 	// If we don't have a name from the input headers

wp-includes/post-template.php

@@ -1003,10 +1003,10 @@ function post_custom( $key = '' ) {
  *
  * @since 1.2.0
  *
- * @internal This will probably change at some point...
- *
+ * @deprecated 6.0.2 Use get_post_meta() to retrieve post meta and render manually.
  */
 function the_meta() {
+	_deprecated_function( __FUNCTION__, '6.0.2', 'get_post_meta()' );
 	if ( $keys = get_post_custom_keys() ) {
 		echo "<ul class='post-meta'>\n";
 		foreach ( (array) $keys as $key ) {
@@ -1020,8 +1020,8 @@ function the_meta() {
 
 			$html = sprintf( "<li><span class='post-meta-key'>%s</span> %s</li>\n",
 				/* translators: %s: Post custom field name */
-				sprintf( _x( '%s:', 'Post custom field name' ), $key ),
-				$value
+				esc_html( sprintf( _x( '%s:', 'Post custom field name' ), $key ) ),
+				esc_html( $value )
 			);
 
 			/**

wp-includes/post.php

@@ -1018,9 +1018,9 @@ function is_post_type_hierarchical( $post_type ) {
 
 /**
  * Determines whether a post type is registered.
- * 
+ *
  * For more information on this and similar theme functions, check out
- * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ 
+ * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 3.0.0
@@ -1778,7 +1778,99 @@ function is_post_type_viewable( $post_type ) {
 		}
 	}
 
-	return $post_type->publicly_queryable || ( $post_type->_builtin && $post_type->public );
+	if ( ! is_object( $post_type ) ) {
+		return false;
+	}
+
+	$is_viewable = $post_type->publicly_queryable || ( $post_type->_builtin && $post_type->public );
+
+	/**
+	 * Filters whether a post type is considered "viewable".
+	 *
+	 * The returned filtered value must be a boolean type to ensure
+	 * `is_post_type_viewable()` only returns a boolean. This strictness
+	 * is by design to maintain backwards-compatibility and guard against
+	 * potential type errors in PHP 8.1+. Non-boolean values (even falsey
+	 * and truthy values) will result in the function returning false.
+	 *
+	 * @since 5.9.0
+	 *
+	 * @param bool         $is_viewable Whether the post type is "viewable" (strict type).
+	 * @param WP_Post_Type $post_type   Post type object.
+	 */
+	return true === apply_filters( 'is_post_type_viewable', $is_viewable, $post_type );
+}
+
+/**
+ * Determines whether a post status is considered "viewable".
+ *
+ * For built-in post statuses such as publish and private, the 'public' value will be evaluated.
+ * For all others, the 'publicly_queryable' value will be used.
+ *
+ * @since 5.7.0
+ * @since 5.9.0 Added `is_post_status_viewable` hook to filter the result.
+ *
+ * @param string|stdClass $post_status Post status name or object.
+ * @return bool Whether the post status should be considered viewable.
+ */
+function is_post_status_viewable( $post_status ) {
+	if ( is_scalar( $post_status ) ) {
+		$post_status = get_post_status_object( $post_status );
+
+		if ( ! $post_status ) {
+			return false;
+		}
+	}
+
+	if (
+		! is_object( $post_status ) ||
+		$post_status->internal ||
+		$post_status->protected
+	) {
+		return false;
+	}
+
+	$is_viewable = $post_status->publicly_queryable || ( $post_status->_builtin && $post_status->public );
+
+	/**
+	 * Filters whether a post status is considered "viewable".
+	 *
+	 * The returned filtered value must be a boolean type to ensure
+	 * `is_post_status_viewable()` only returns a boolean. This strictness
+	 * is by design to maintain backwards-compatibility and guard against
+	 * potential type errors in PHP 8.1+. Non-boolean values (even falsey
+	 * and truthy values) will result in the function returning false.
+	 *
+	 * @since 5.9.0
+	 *
+	 * @param bool     $is_viewable Whether the post status is "viewable" (strict type).
+	 * @param stdClass $post_status Post status object.
+	 */
+	return true === apply_filters( 'is_post_status_viewable', $is_viewable, $post_status );
+}
+
+/**
+ * Determines whether a post is publicly viewable.
+ *
+ * Posts are considered publicly viewable if both the post status and post type
+ * are viewable.
+ *
+ * @since 5.7.0
+ *
+ * @param int|WP_Post|null $post Optional. Post ID or post object. Defaults to global $post.
+ * @return bool Whether the post is publicly viewable.
+ */
+function is_post_publicly_viewable( $post = null ) {
+	$post = get_post( $post );
+
+	if ( ! $post ) {
+		return false;
+	}
+
+	$post_type   = get_post_type( $post );
+	$post_status = get_post_status( $post );
+
+	return is_post_type_viewable( $post_type ) && is_post_status_viewable( $post_status );
 }
 
 /**
@@ -2044,11 +2136,11 @@ function get_post_custom_values( $key = '', $post_id = 0 ) {
  *
  * Sticky posts should remain at the top of The Loop. If the post ID is not
  * given, then The Loop ID for the current post will be used.
- * 
+ *
  * For more information on this and similar theme functions, check out
- * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ 
+ * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
- * 
+ *
  * @since 2.7.0
  *
  * @param int $post_id Optional. Post ID. Default is ID of the global $post.
@@ -4059,7 +4151,7 @@ function _truncate_post_slug( $slug, $length = 200 ) {
 		if ( $decoded_slug === $slug )
 			$slug = substr( $slug, 0, $length );
 		else
-			$slug = utf8_uri_encode( $decoded_slug, $length );
+			$slug = utf8_uri_encode( $decoded_slug, $length, true );
 	}
 
 	return rtrim( $slug, '-' );
@@ -5026,11 +5118,11 @@ function get_pages( $args = array() ) {
 
 /**
  * Determines whether an attachment URI is local and really an attachment.
- * 
+ *
  * For more information on this and similar theme functions, check out
- * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ 
+ * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
- * 
+ *
  * @since 2.0.0
  *
  * @param string $url URL to check
@@ -5527,9 +5619,9 @@ function wp_attachment_is( $type, $post = null ) {
 
 /**
  * Determines whether an attachment is an image.
- * 
+ *
  * For more information on this and similar theme functions, check out
- * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ 
+ * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 2.1.0
@@ -6538,35 +6630,6 @@ function wp_add_trashed_suffix_to_post_name_for_post( $post ) {
 	return $post_name;
 }
 
-/**
- * Filter the SQL clauses of an attachment query to include filenames.
- *
- * @since 4.7.0
- * @access private
- *
- * @global wpdb $wpdb WordPress database abstraction object.
- *
- * @param array $clauses An array including WHERE, GROUP BY, JOIN, ORDER BY,
- *                       DISTINCT, fields (SELECT), and LIMITS clauses.
- * @return array The modified clauses.
- */
-function _filter_query_attachment_filenames( $clauses ) {
-	global $wpdb;
-	remove_filter( 'posts_clauses', __FUNCTION__ );
-
-	// Add a LEFT JOIN of the postmeta table so we don't trample existing JOINs.
-	$clauses['join'] .= " LEFT JOIN {$wpdb->postmeta} AS sq1 ON ( {$wpdb->posts}.ID = sq1.post_id AND sq1.meta_key = '_wp_attached_file' )";
-
-	$clauses['groupby'] = "{$wpdb->posts}.ID";
-
-	$clauses['where'] = preg_replace(
-		"/\({$wpdb->posts}.post_content (NOT LIKE|LIKE) (\'[^']+\')\)/",
-		"$0 OR ( sq1.meta_value $1 $2 )",
-		$clauses['where'] );
-
-	return $clauses;
-}
-
 /**
  * Sets the last changed time for the 'posts' cache group.
  *

wp-includes/rest-api.php

@@ -812,6 +812,7 @@ function rest_cookie_check_errors( $result ) {
 	$result = wp_verify_nonce( $nonce, 'wp_rest' );
 
 	if ( ! $result ) {
+		add_filter( 'rest_send_nocache_headers', '__return_true', 20 );
 		return new WP_Error( 'rest_cookie_invalid_nonce', __( 'Cookie nonce is invalid' ), array( 'status' => 403 ) );
 	}
 

wp-includes/rest-api/class-wp-rest-server.php

@@ -234,24 +234,6 @@ class WP_REST_Server {
 		$this->send_header( 'Access-Control-Expose-Headers', 'X-WP-Total, X-WP-TotalPages' );
 		$this->send_header( 'Access-Control-Allow-Headers', 'Authorization, Content-Type' );
 
-		/**
-		 * Send nocache headers on authenticated requests.
-		 *
-		 * @since 4.4.0
-		 *
-		 * @param bool $rest_send_nocache_headers Whether to send no-cache headers.
-		 */
-		$send_no_cache_headers = apply_filters( 'rest_send_nocache_headers', is_user_logged_in() );
-		if ( $send_no_cache_headers ) {
-			foreach ( wp_get_nocache_headers() as $header => $header_value ) {
-				if ( empty( $header_value ) ) {
-					$this->remove_header( $header );
-				} else {
-					$this->send_header( $header, $header_value );
-				}
-			}
-		}
-
 		/**
 		 * Filters whether the REST API is enabled.
 		 *
@@ -309,10 +291,12 @@ class WP_REST_Server {
 		 * $_GET['_method']. If that is not set, we check for the HTTP_X_HTTP_METHOD_OVERRIDE
 		 * header.
 		 */
+		$method_overridden = false;
 		if ( isset( $_GET['_method'] ) ) {
 			$request->set_method( $_GET['_method'] );
 		} elseif ( isset( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] ) ) {
 			$request->set_method( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] );
+			$method_overridden = true;
 		}
 
 		$result = $this->check_authentication();
@@ -371,6 +355,28 @@ class WP_REST_Server {
 		 */
 		$served = apply_filters( 'rest_pre_serve_request', false, $result, $request, $this );
 
+		/**
+		 * Filters whether to send nocache headers on a REST API request.
+		 *
+		 * @since 4.4.0
+		 * @since 6.x.x Moved the block to catch the filter added on rest_cookie_check_errors() from rest-api.php
+		 *
+		 * @param bool $rest_send_nocache_headers Whether to send no-cache headers.
+		 */
+		$send_no_cache_headers = apply_filters( 'rest_send_nocache_headers', is_user_logged_in() );
+
+		// send no cache headers if the $send_no_cache_headers is true
+		// OR if the HTTP_X_HTTP_METHOD_OVERRIDE is used but resulted a 4xx response code.
+		if ( $send_no_cache_headers || ( true === $method_overridden && strpos( $code, '4' ) === 0 ) ) {
+			foreach ( wp_get_nocache_headers() as $header => $header_value ) {
+				if ( empty( $header_value ) ) {
+					$this->remove_header( $header );
+				} else {
+					$this->send_header( $header, $header_value );
+				}
+			}
+		}
+
 		if ( ! $served ) {
 			if ( 'HEAD' === $request->get_method() ) {
 				return null;

wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php

@@ -48,7 +48,7 @@ class WP_REST_Attachments_Controller extends WP_REST_Posts_Controller {
 
 		// Filter query clauses to include filenames.
 		if ( isset( $query_args['s'] ) ) {
-			add_filter( 'posts_clauses', '_filter_query_attachment_filenames' );
+			add_filter( 'wp_allow_query_attachment_by_filename', '__return_true' );
 		}
 
 		return $query_args;

wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php

@@ -126,6 +126,35 @@ class WP_REST_Terms_Controller extends WP_REST_Controller {
 		) );
 	}
 
+	/**
+	 * Checks if the terms for a post can be read.
+	 *
+	 * @since 6.0.3
+	 *
+	 * @param WP_Post         $post    Post object.
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return bool Whether the terms for the post can be read.
+	 */
+	public function check_read_terms_permission_for_post( $post, $request ) {
+		// If the requested post isn't associated with this taxonomy, deny access.
+		if ( ! is_object_in_taxonomy( $post->post_type, $this->taxonomy ) ) {
+			return false;
+		}
+
+		// Grant access if the post is publicly viewable.
+		if ( is_post_publicly_viewable( $post ) ) {
+			return true;
+		}
+
+		// Otherwise grant access if the post is readable by the logged in user.
+		if ( current_user_can( 'read_post', $post->ID ) ) {
+			return true;
+		}
+
+		// Otherwise, deny access.
+		return false;
+	}
+
 	/**
 	 * Checks if a request has access to read terms in the specified taxonomy.
 	 *
@@ -136,12 +165,43 @@ class WP_REST_Terms_Controller extends WP_REST_Controller {
 	 */
 	public function get_items_permissions_check( $request ) {
 		$tax_obj = get_taxonomy( $this->taxonomy );
+
 		if ( ! $tax_obj || ! $this->check_is_taxonomy_allowed( $this->taxonomy ) ) {
 			return false;
 		}
+
 		if ( 'edit' === $request['context'] && ! current_user_can( $tax_obj->cap->edit_terms ) ) {
-			return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to edit terms in this taxonomy.' ), array( 'status' => rest_authorization_required_code() ) );
+			return new WP_Error(
+				'rest_forbidden_context',
+				__( 'Sorry, you are not allowed to edit terms in this taxonomy.' ),
+				array( 'status' => rest_authorization_required_code() )
+			);
 		}
+
+		if ( ! empty( $request['post'] ) ) {
+			$post = get_post( $request['post'] );
+
+			if ( ! $post ) {
+				return new WP_Error(
+					'rest_post_invalid_id',
+					__( 'Invalid post ID.' ),
+					array(
+						'status' => 400,
+					)
+				);
+			}
+
+			if ( ! $this->check_read_terms_permission_for_post( $post, $request ) ) {
+				return new WP_Error(
+					'rest_forbidden_context',
+					__( 'Sorry, you are not allowed to view terms for this post.' ),
+					array(
+						'status' => rest_authorization_required_code(),
+					)
+				);
+			}
+		}
+
 		return true;
 	}
 

wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php

@@ -271,6 +271,9 @@ class WP_REST_Users_Controller extends WP_REST_Controller {
 		}
 
 		if ( ! empty( $prepared_args['search'] ) ) {
+			if ( ! current_user_can( 'list_users' ) ) {
+				$prepared_args['search_columns'] = array( 'ID', 'user_login', 'user_nicename', 'display_name' );
+			}
 			$prepared_args['search'] = '*' . $prepared_args['search'] . '*';
 		}
 		/**

wp-includes/script-loader.php

@@ -989,7 +989,7 @@ function wp_default_scripts( &$scripts ) {
 	// jQuery plugins
 	$scripts->add( 'jquery-color', "/wp-includes/js/jquery/jquery.color.min.js", array('jquery'), '2.1.1', 1 );
 	$scripts->add( 'schedule', '/wp-includes/js/jquery/jquery.schedule.js', array('jquery'), '20m', 1 );
-	$scripts->add( 'jquery-query', "/wp-includes/js/jquery/jquery.query.js", array('jquery'), '2.1.7', 1 );
+	$scripts->add( 'jquery-query', "/wp-includes/js/jquery/jquery.query.js", array('jquery'), '2.2.3', 1 );
 	$scripts->add( 'jquery-serialize-object', "/wp-includes/js/jquery/jquery.serialize-object.js", array('jquery'), '0.2', 1 );
 	$scripts->add( 'jquery-hotkeys', "/wp-includes/js/jquery/jquery.hotkeys$suffix.js", array('jquery'), '0.0.2m', 1 );
 	$scripts->add( 'jquery-table-hotkeys', "/wp-includes/js/jquery/jquery.table-hotkeys$suffix.js", array('jquery', 'jquery-hotkeys'), false, 1 );

wp-includes/shortcodes.php

@@ -159,7 +159,45 @@ function has_shortcode( $content, $tag ) {
 }
 
 /**
- * Search content for shortcodes and filter shortcodes through their hooks.
+ * Returns a list of registered shortcode names found in the given content.
+ *
+ * Example usage:
+ *
+ *     get_shortcode_tags_in_content( '[audio src="file.mp3"][/audio] [foo] [gallery ids="1,2,3"]' );
+ *     // array( 'audio', 'gallery' )
+ *
+ * @since 6.3.2
+ *
+ * @param string $content The content to check.
+ * @return string[] An array of registered shortcode names found in the content.
+ */
+function get_shortcode_tags_in_content( $content ) {
+	if ( false === strpos( $content, '[' ) ) {
+		return array();
+	}
+
+	preg_match_all( '/' . get_shortcode_regex() . '/', $content, $matches, PREG_SET_ORDER );
+	if ( empty( $matches ) ) {
+		return array();
+	}
+
+	$tags = array();
+	foreach ( $matches as $shortcode ) {
+		$tags[] = $shortcode[2];
+
+		if ( ! empty( $shortcode[5] ) ) {
+			$deep_tags = get_shortcode_tags_in_content( $shortcode[5] );
+			if ( ! empty( $deep_tags ) ) {
+				$tags = array_merge( $tags, $deep_tags );
+			}
+		}
+	}
+
+	return $tags;
+}
+
+/**
+ * Searches content for shortcodes and filter shortcodes through their hooks.
  *
  * If there are no shortcode tags defined, then the content will be returned
  * without any filtering. This might cause issues when plugins are disabled but

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0.14';
+$wp_version = '5.0.20';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

wp-includes/widgets.php

@@ -1408,7 +1408,7 @@ function wp_widget_rss_output( $rss, $args = array() ) {
 
 	if ( is_wp_error($rss) ) {
 		if ( is_admin() || current_user_can('manage_options') )
-			echo '<p><strong>' . __( 'RSS Error:' ) . '</strong> ' . $rss->get_error_message() . '</p>';
+			echo '<p><strong>' . __( 'RSS Error:' ) . '</strong> ' . esc_html( $rss->get_error_message() ) . '</p>';
 		return;
 	}
 
@@ -1517,7 +1517,7 @@ function wp_widget_rss_form( $args, $inputs = null ) {
 	$args['show_date']      = isset( $args['show_date'] ) ? (int) $args['show_date'] : (int) $inputs['show_date'];
 
 	if ( ! empty( $args['error'] ) ) {
-		echo '<p class="widget-error"><strong>' . __( 'RSS Error:' ) . '</strong> ' . $args['error'] . '</p>';
+		echo '<p class="widget-error"><strong>' . __( 'RSS Error:' ) . '</strong> ' . esc_html( $args['error'] ) . '</p>';
 	}
 
 	$esc_number = esc_attr( $args['number'] );

wp-mail.php

@@ -60,6 +60,9 @@ if( 0 === $count ) {
 	wp_die( __('There doesn’t seem to be any new mail.') );
 }
 
+// Always run as an unauthenticated user.
+wp_set_current_user( 0 );
+
 for ( $i = 1; $i <= $count; $i++ ) {
 
 	$message = $pop3->get($i);
@@ -124,11 +127,9 @@ for ( $i = 1; $i <= $count; $i++ ) {
 					$author = trim($line);
 				$author = sanitize_email($author);
 				if ( is_email($author) ) {
-					/* translators: Post author email address */
-					echo '<p>' . sprintf(__('Author is %s'), $author) . '</p>';
 					$userdata = get_user_by('email', $author);
 					if ( ! empty( $userdata ) ) {
-						$post_author = $userdata->ID;
+						$post_author  = $userdata->ID;
 						$author_found = true;
 					}
 				}

wp-trackback.php

@@ -13,6 +13,9 @@ if (empty($wp)) {
 	wp( array( 'tb' => '1' ) );
 }
 
+// Always run as an unauthenticated user.
+wp_set_current_user( 0 );
+
 /**
  * Response to a trackback.
  *