Tag 4.8.23

Built from https://develop.svn.wordpress.org/tags/4.8.23@56914


git-svn-id: http://core.svn.wordpress.org/tags/4.8.23@56425 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/about.php

@@ -45,6 +45,86 @@ 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.' ),
+					'4.8.23'
+				);
+				?>
+				<?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( '4.8.23' )
+					)
+				);
+				?>
+			</p>
+			<p>
+				<?php
+				printf(
+					/* translators: %s: WordPress version number */
+					__( '<strong>Version %s</strong> addressed some security issues.' ),
+					'4.8.22'
+				);
+				?>
+				<?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( '4.8.22' )
+					)
+				);
+				?>
+			</p>
+			<p>
+				<?php
+				printf(
+					/* translators: %s: WordPress version number */
+					__( '<strong>Version %s</strong> addressed some security issues.' ),
+					'4.8.21'
+				);
+				?>
+				<?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( '4.8.21' )
+					)
+				);
+				?>
+			</p>
+			<p>
+				<?php
+				printf(
+					/* translators: %s: WordPress version number */
+					__( '<strong>Version %s</strong> addressed some security issues.' ),
+					'4.8.20'
+				);
+				?>
+				<?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( '4.8.20' )
+					)
+				);
+				?>
+			</p>
 			<p>
 				<?php
 				printf(
@@ -515,3 +595,15 @@ _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

@@ -2254,6 +2254,10 @@ 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 ) {
@@ -2466,7 +2470,7 @@ 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' );
 	}
 
 	/**
@@ -3108,13 +3112,29 @@ 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

@@ -499,6 +499,19 @@ 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

@@ -654,7 +654,20 @@ 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">—</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

@@ -1169,7 +1169,7 @@ 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/plugins.php

@@ -437,7 +437,7 @@ 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>';
 	}
 }
@@ -472,7 +472,7 @@ 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/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-query.php

@@ -486,6 +486,13 @@ 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.
 	 *
@@ -1346,7 +1353,12 @@ 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 ';
 		}
 
@@ -1683,6 +1695,16 @@ 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 );
@@ -2087,7 +2109,7 @@ 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";
 		}
 
@@ -2136,6 +2158,10 @@ 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-theme.php

@@ -546,6 +546,28 @@ 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.
 	 *
@@ -1514,4 +1536,16 @@ 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

@@ -2146,6 +2146,15 @@ 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);
 
@@ -2156,6 +2165,10 @@ 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

@@ -69,7 +69,7 @@ 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

@@ -151,8 +151,8 @@ 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';
 		}
@@ -232,6 +232,9 @@ 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.
@@ -1017,4 +1020,20 @@ 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

@@ -3878,3 +3878,21 @@ function _sort_nav_menu_items( $a, $b ) {
 	else
 		return strcmp( $a->$_menu_item_sort_prop, $b->$_menu_item_sort_prop );
 }
+
+/**
+ * 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.
 		 */
 		$output .=<<<JS
-		!function(c,d){"use strict";var e=!1,n=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},!c.wp.receiveEmbedMessage)if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(t.secret||t.message||t.value)if(!/[^a-zA-Z0-9]/.test(t.secret)){for(var r,a,i,s=d.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=d.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=0;o<n.length;o++)n[o].style.display="none";for(o=0;o<s.length;o++)if(r=s[o],e.source===r.contentWindow){if(r.removeAttribute("style"),"height"===t.message){if(1e3<(i=parseInt(t.value,10)))i=1e3;else if(~~i<200)i=200;r.height=i}if("link"===t.message)if(a=d.createElement("a"),i=d.createElement("a"),a.href=r.getAttribute("src"),i.href=t.value,i.host===a.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),d.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(!n){n=!0;for(var e,t,r=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=d.querySelectorAll("iframe.wp-embedded-content"),s=0;s<i.length;s++){if(!(e=i[s]).getAttribute("data-secret"))t=Math.random().toString(36).substr(2,10),e.src+="#?secret="+t,e.setAttribute("data-secret",t);if(r||a)(t=e.cloneNode(!0)).removeAttribute("security"),e.parentNode.replaceChild(t,e)}}}}(window,document);
+		!function(d,l){"use strict";var e=!1,n=!1;if(l.querySelector)if(d.addEventListener)e=!0;if(d.wp=d.wp||{},!d.wp.receiveEmbedMessage)if(d.wp.receiveEmbedMessage=function(e){var t=e.data;if(t.secret||t.message||t.value)if(!/[^a-zA-Z0-9]/.test(t.secret)){for(var r,a,i,s=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=new RegExp("^https?:$","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<(i=parseInt(t.value,10)))i=1e3;else if(~~i<200)i=200;r.height=i}if("link"===t.message)if(a=l.createElement("a"),i=l.createElement("a"),a.href=r.getAttribute("src"),i.href=t.value,o.test(i.protocol))if(i.host===a.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"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=l.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);
 JS;
 	}
 	$output .= "\n//--><!]]>";

wp-includes/functions.php

@@ -2369,7 +2369,7 @@ 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;
@@ -2378,7 +2378,7 @@ 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();
 
@@ -2650,9 +2650,12 @@ function wp_nonce_ays( $action ) {
 	} else {
 		$html = __( 'Are you sure you want to do this?' );
 		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/wp-embed.js

@@ -37,6 +37,7 @@
 
 		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++ ) {
@@ -72,6 +73,11 @@
 				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.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.secret||t.message||t.value)if(!/[^a-zA-Z0-9]/.test(t.secret)){for(var r,a,i,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<(i=parseInt(t.value,10)))i=1e3;else if(~~i<200)i=200;r.height=i}if("link"===t.message)if(a=l.createElement("a"),i=l.createElement("a"),a.href=r.getAttribute("src"),i.href=t.value,o.test(i.protocol))if(i.host===a.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"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=l.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);

wp-includes/media-template.php

@@ -1252,7 +1252,7 @@ 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

@@ -1689,11 +1689,24 @@ 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 '';
 	}
@@ -1993,6 +2006,15 @@ 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 '';
 	}
@@ -3435,8 +3457,9 @@ 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' ),
-			'wpRestApi'    => wp_create_nonce( 'wp_rest' ),
+			'sendToEditor'           => wp_create_nonce( 'media-send-to-editor' ),
+			'wpRestApi'              => wp_create_nonce( 'wp_rest' ),
+			'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

@@ -995,10 +995,10 @@ 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 ) {
@@ -1017,7 +1017,7 @@ function the_meta() {
 			 * @param string $key   Meta key.
 			 * @param string $value Meta value.
 			 */
-			echo apply_filters( 'the_meta_key', "<li><span class='post-meta-key'>$key:</span> $value</li>\n", $key, $value );
+			echo apply_filters( 'the_meta_key', "<li><span class='post-meta-key'>" . esc_html( $key ) . ":</span>" . esc_html( $value ) . "</li>\n", $key, $value );
 		}
 		echo "</ul>\n";
 	}

wp-includes/post.php

@@ -1631,7 +1631,99 @@ 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 );
 }
 
 /**
@@ -6241,32 +6333,3 @@ function wp_add_trashed_suffix_to_post_name_for_post( $post ) {
 	clean_post_cache( $post->ID );
 	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;
-}

wp-includes/rest-api.php

@@ -748,6 +748,7 @@ 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

@@ -242,24 +242,6 @@ 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.
 		 *
@@ -317,10 +299,12 @@ 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();
@@ -379,6 +363,28 @@ 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

@@ -49,7 +49,7 @@ 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

@@ -132,6 +132,35 @@ 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.
 	 *
@@ -143,12 +172,43 @@ 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

@@ -260,6 +260,9 @@ 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/shortcodes.php

@@ -185,7 +185,45 @@ 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 = '4.8.19';
+$wp_version = '4.8.23';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

wp-includes/widgets.php

@@ -1233,7 +1233,7 @@ 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;
 	}
 
@@ -1342,7 +1342,7 @@ 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);
@@ -124,8 +127,6 @@ 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;

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.
  *