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<title>[55785] branches/5.4: Grouped backports to the 5.4 branch.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/55785">55785</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/55785","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>audrasjb</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-05-16 15:50:15 +0000 (Tue, 16 May 2023)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Grouped backports to the 5.4 branch.

- Media: Prevent CSRF setting attachment thumbnails.
- Embeds: Add protocol validation for WordPress Embed code.
- I18N: Introduce sanitization function for locale.
- Editor: Ensure block comments are of a valid form.

Merges [55760-55764] to the 5.4 branch.
Props dd32, isabel_brison, martinkrcho, matveb, ocean90, paulkevan, peterwilsoncc, timothyblynjacobs, xknown, youknowriad.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branches54packagelockjson">branches/5.4/package-lock.json</a></li>
<li><a href="#branches54packagejson">branches/5.4/package.json</a></li>
<li><a href="#branches54srcjs_enqueueswpembedjs">branches/5.4/src/js/_enqueues/wp/embed.js</a></li>
<li><a href="#branches54srcjsmediaviewsframevideodetailsjs">branches/5.4/src/js/media/views/frame/video-details.js</a></li>
<li><a href="#branches54srcwpadminaboutphp">branches/5.4/src/wp-admin/about.php</a></li>
<li><a href="#branches54srcwpadminincludesajaxactionsphp">branches/5.4/src/wp-admin/includes/ajax-actions.php</a></li>
<li><a href="#branches54srcwpincludesblocksphp">branches/5.4/src/wp-includes/blocks.php</a></li>
<li><a href="#branches54srcwpincludesformattingphp">branches/5.4/src/wp-includes/formatting.php</a></li>
<li><a href="#branches54srcwpincludesl10nphp">branches/5.4/src/wp-includes/l10n.php</a></li>
<li><a href="#branches54srcwpincludesmediaphp">branches/5.4/src/wp-includes/media.php</a></li>
<li><a href="#branches54srcwpincludesversionphp">branches/5.4/src/wp-includes/version.php</a></li>
<li><a href="#branches54testsphpunittestsajaxAttachmentsphp">branches/5.4/tests/phpunit/tests/ajax/Attachments.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#branches54testsphpunittestsformattingsanitizeLocaleNamephp">branches/5.4/tests/phpunit/tests/formatting/sanitizeLocaleName.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="branches54packagelockjson"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/package-lock.json</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/package-lock.json    2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/package-lock.json      2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1,6 +1,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> {
</span><span class="cx" style="display: block; padding: 0 10px">        "name": "WordPress",
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        "version": "5.4.12",
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ "version": "5.4.13",
</ins><span class="cx" style="display: block; padding: 0 10px">         "lockfileVersion": 1,
</span><span class="cx" style="display: block; padding: 0 10px">        "requires": true,
</span><span class="cx" style="display: block; padding: 0 10px">        "dependencies": {
</span></span></pre></div>
<a id="branches54packagejson"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/package.json</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/package.json 2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/package.json   2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1,6 +1,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> {
</span><span class="cx" style="display: block; padding: 0 10px">        "name": "WordPress",
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        "version": "5.4.12",
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ "version": "5.4.13",
</ins><span class="cx" style="display: block; padding: 0 10px">         "description": "WordPress is open source software you can use to create a beautiful website, blog, or app.",
</span><span class="cx" style="display: block; padding: 0 10px">        "repository": {
</span><span class="cx" style="display: block; padding: 0 10px">                "type": "svn",
</span></span></pre></div>
<a id="branches54srcjs_enqueueswpembedjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/src/js/_enqueues/wp/embed.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/src/js/_enqueues/wp/embed.js 2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/src/js/_enqueues/wp/embed.js   2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -44,6 +44,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                var iframes = document.querySelectorAll( 'iframe[data-secret="' + data.secret + '"]' ),
</span><span class="cx" style="display: block; padding: 0 10px">                        blockquotes = document.querySelectorAll( 'blockquote[data-secret="' + data.secret + '"]' ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        allowedProtocols = new RegExp( '^https?:$', 'i' ),
</ins><span class="cx" style="display: block; padding: 0 10px">                         i, source, height, sourceURL, targetURL;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                for ( i = 0; i < blockquotes.length; i++ ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -79,6 +80,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                sourceURL.href = source.getAttribute( 'src' );
</span><span class="cx" style="display: block; padding: 0 10px">                                targetURL.href = data.value;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                /* Only follow link if the protocol is in the allow list. */
+                               if ( ! allowedProtocols.test( targetURL.protocol ) ) {
+                                       continue;
+                               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                                 /* Only continue if link hostname matches iframe's hostname. */
</span><span class="cx" style="display: block; padding: 0 10px">                                if ( targetURL.host === sourceURL.host ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                        if ( document.activeElement === source ) {
</span></span></pre></div>
<a id="branches54srcjsmediaviewsframevideodetailsjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/src/js/media/views/frame/video-details.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/src/js/media/views/frame/video-details.js    2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/src/js/media/views/frame/video-details.js      2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -106,6 +106,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        wp.ajax.send( 'set-attachment-thumbnail', {
</span><span class="cx" style="display: block; padding: 0 10px">                                data : {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                        _ajax_nonce: wp.media.view.settings.nonce.setAttachmentThumbnail,
</ins><span class="cx" style="display: block; padding: 0 10px">                                         urls: urls,
</span><span class="cx" style="display: block; padding: 0 10px">                                        thumbnail_id: attachment.get( 'id' )
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span></span></pre></div>
<a id="branches54srcwpadminaboutphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/src/wp-admin/about.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/src/wp-admin/about.php       2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/src/wp-admin/about.php 2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -56,6 +56,26 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        printf(
</span><span class="cx" style="display: block; padding: 0 10px">                                                /* translators: %s: WordPress version number */
</span><span class="cx" style="display: block; padding: 0 10px">                                                __( '<strong>Version %s</strong> addressed some security issues.' ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                '5.4.13'
+                                       );
+                                       ?>
+                                       <?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( '5.4.13' )
+                                               )
+                                       );
+                                       ?>
+                               </p>
+                               <p>
+                                       <?php
+                                       printf(
+                                               /* translators: %s: WordPress version number */
+                                               __( '<strong>Version %s</strong> addressed some security issues.' ),
</ins><span class="cx" style="display: block; padding: 0 10px">                                                 '5.4.12'
</span><span class="cx" style="display: block; padding: 0 10px">                                        );
</span><span class="cx" style="display: block; padding: 0 10px">                                        ?>
</span></span></pre></div>
<a id="branches54srcwpadminincludesajaxactionsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/src/wp-admin/includes/ajax-actions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/src/wp-admin/includes/ajax-actions.php       2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/src/wp-admin/includes/ajax-actions.php 2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2698,6 +2698,10 @@
</span><span class="cx" style="display: block; padding: 0 10px">                wp_send_json_error();
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        if ( false === check_ajax_referer( 'set-attachment-thumbnail', '_ajax_nonce', false ) ) {
+               wp_send_json_error();
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         $post_ids = array();
</span><span class="cx" style="display: block; padding: 0 10px">        // For each URL, try to find its corresponding post ID.
</span><span class="cx" style="display: block; padding: 0 10px">        foreach ( $_POST['urls'] as $url ) {
</span></span></pre></div>
<a id="branches54srcwpincludesblocksphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/src/wp-includes/blocks.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/src/wp-includes/blocks.php   2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/src/wp-includes/blocks.php     2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -271,6 +271,10 @@
</span><span class="cx" style="display: block; padding: 0 10px"> function filter_block_content( $text, $allowed_html = 'post', $allowed_protocols = array() ) {
</span><span class="cx" style="display: block; padding: 0 10px">        $result = '';
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        if ( false !== strpos( $text, '<!--' ) && false !== strpos( $text, '--->' ) ) {
+               $text = preg_replace_callback( '%<!--(.*?)--->%', '_filter_block_content_callback', $text );
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         $blocks = parse_blocks( $text );
</span><span class="cx" style="display: block; padding: 0 10px">        foreach ( $blocks as $block ) {
</span><span class="cx" style="display: block; padding: 0 10px">                $block   = filter_block_kses( $block, $allowed_html, $allowed_protocols );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -281,6 +285,19 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * 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], '-' ) . '-->';
+}
+
+/**
</ins><span class="cx" style="display: block; padding: 0 10px">  * Filters and sanitizes a parsed block to remove non-allowable HTML from block
</span><span class="cx" style="display: block; padding: 0 10px">  * attribute values.
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span></span></pre></div>
<a id="branches54srcwpincludesformattingphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/src/wp-includes/formatting.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/src/wp-includes/formatting.php       2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/src/wp-includes/formatting.php 2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2375,6 +2375,29 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * 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 );
+}
+
+/**
</ins><span class="cx" style="display: block; padding: 0 10px">  * Converts lone & characters into `&#038;` (a.k.a. `&amp;`)
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 0.71
</span></span></pre></div>
<a id="branches54srcwpincludesl10nphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/src/wp-includes/l10n.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/src/wp-includes/l10n.php     2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/src/wp-includes/l10n.php       2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -144,7 +144,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        if ( ! empty( $_GET['wp_lang'] ) && ! empty( $GLOBALS['pagenow'] ) && 'wp-login.php' === $GLOBALS['pagenow'] ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $determined_locale = sanitize_text_field( $_GET['wp_lang'] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $determined_locale = sanitize_locale_name( wp_unslash( $_GET['wp_lang'] ) );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span></span></pre></div>
<a id="branches54srcwpincludesmediaphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/src/wp-includes/media.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/src/wp-includes/media.php    2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/src/wp-includes/media.php      2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3825,7 +3825,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                /** This filter is documented in wp-admin/includes/media.php */
</span><span class="cx" style="display: block; padding: 0 10px">                'captions'         => ! apply_filters( 'disable_captions', '' ),
</span><span class="cx" style="display: block; padding: 0 10px">                'nonce'            => array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'sendToEditor' => wp_create_nonce( 'media-send-to-editor' ),
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'sendToEditor'           => wp_create_nonce( 'media-send-to-editor' ),
+                       'setAttachmentThumbnail' => wp_create_nonce( 'set-attachment-thumbnail' ),
</ins><span class="cx" style="display: block; padding: 0 10px">                 ),
</span><span class="cx" style="display: block; padding: 0 10px">                'post'             => array(
</span><span class="cx" style="display: block; padding: 0 10px">                        'id' => 0,
</span></span></pre></div>
<a id="branches54srcwpincludesversionphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/src/wp-includes/version.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/src/wp-includes/version.php  2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/src/wp-includes/version.php    2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -13,7 +13,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @global string $wp_version
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-$wp_version = '5.4.12-src';
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+$wp_version = '5.4.13-src';
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px">  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
</span></span></pre></div>
<a id="branches54testsphpunittestsajaxAttachmentsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.4/tests/phpunit/tests/ajax/Attachments.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/tests/phpunit/tests/ajax/Attachments.php     2023-05-16 15:46:57 UTC (rev 55784)
+++ branches/5.4/tests/phpunit/tests/ajax/Attachments.php       2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -113,4 +113,95 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertTrue( $response['success'] );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( $expected, $response['data'] );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       public function test_wp_ajax_set_attachment_thumbnail_success() {
+               // Become an administrator.
+               $post    = $_POST;
+               $user_id = self::factory()->user->create(
+                       array(
+                               'role'       => 'administrator',
+                               'user_login' => 'user_36578_administrator',
+                               'user_email' => 'user_36578_administrator@example.com',
+                       )
+               );
+               wp_set_current_user( $user_id );
+               $_POST = array_merge( $_POST, $post );
+
+               // Upload the attachment itself.
+               $filename = DIR_TESTDATA . '/uploads/small-audio.mp3';
+               $contents = file_get_contents( $filename );
+
+               $upload     = wp_upload_bits( wp_basename( $filename ), null, $contents );
+               $attachment = $this->_make_attachment( $upload );
+
+               // Upload the thumbnail.
+               $filename = DIR_TESTDATA . '/images/waffles.jpg';
+               $contents = file_get_contents( $filename );
+
+               $upload    = wp_upload_bits( wp_basename( $filename ), null, $contents );
+               $thumbnail = $this->_make_attachment( $upload );
+
+               // Set up a default request.
+               $_POST['_ajax_nonce']  = wp_create_nonce( 'set-attachment-thumbnail' );
+               $_POST['thumbnail_id'] = $thumbnail;
+               $_POST['urls']         = array( wp_get_attachment_url( $attachment ) );
+
+               // Make the request.
+               try {
+                       $this->_handleAjax( 'set-attachment-thumbnail' );
+               } catch ( WPAjaxDieContinueException $e ) {
+                       unset( $e );
+               }
+
+               // Get the response.
+               $response = json_decode( $this->_last_response, true );
+
+               // Ensure everything is correct.
+               $this->assertTrue( $response['success'] );
+       }
+
+       public function test_wp_ajax_set_attachment_thumbnail_missing_nonce() {
+               // Become an administrator.
+               $post    = $_POST;
+               $user_id = self::factory()->user->create(
+                       array(
+                               'role'       => 'administrator',
+                               'user_login' => 'user_36578_administrator',
+                               'user_email' => 'user_36578_administrator@example.com',
+                       )
+               );
+               wp_set_current_user( $user_id );
+               $_POST = array_merge( $_POST, $post );
+
+               // Upload the attachment itself.
+               $filename = DIR_TESTDATA . '/uploads/small-audio.mp3';
+               $contents = file_get_contents( $filename );
+
+               $upload     = wp_upload_bits( wp_basename( $filename ), null, $contents );
+               $attachment = $this->_make_attachment( $upload );
+
+               // Upload the thumbnail.
+               $filename = DIR_TESTDATA . '/images/waffles.jpg';
+               $contents = file_get_contents( $filename );
+
+               $upload    = wp_upload_bits( wp_basename( $filename ), null, $contents );
+               $thumbnail = $this->_make_attachment( $upload );
+
+               // Set up a default request.
+               $_POST['thumbnail_id'] = $thumbnail;
+               $_POST['urls']         = array( wp_get_attachment_url( $attachment ) );
+
+               // Make the request.
+               try {
+                       $this->_handleAjax( 'set-attachment-thumbnail' );
+               } catch ( WPAjaxDieContinueException $e ) {
+                       unset( $e );
+               }
+
+               // Get the response.
+               $response = json_decode( $this->_last_response, true );
+
+               // Check that success is false without sending nonce.
+               $this->assertFalse( $response['success'] );
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre></div>
<a id="branches54testsphpunittestsformattingsanitizeLocaleNamephp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: branches/5.4/tests/phpunit/tests/formatting/sanitizeLocaleName.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.4/tests/phpunit/tests/formatting/sanitizeLocaleName.php                                (rev 0)
+++ branches/5.4/tests/phpunit/tests/formatting/sanitizeLocaleName.php  2023-05-16 15:50:15 UTC (rev 55785)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,49 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+
+/**
+ * @group formatting
+ *
+ * @covers ::sanitize_locale_name
+ */
+class Tests_Formatting_SanitizeLocaleName extends WP_UnitTestCase {
+       /**
+        * @dataProvider data_sanitize_locale_name_returns_non_empty_string
+        */
+       public function test_sanitize_locale_name_returns_non_empty_string( $expected, $input ) {
+               $this->assertSame( $expected, sanitize_locale_name( $input ) );
+       }
+
+       public function data_sanitize_locale_name_returns_non_empty_string() {
+               return array(
+                       // array( expected, input )
+                       array( 'en_US', 'en_US' ),
+                       array( 'en', 'en' ),
+                       array( 'fr_FR', 'fr_FR' ),
+                       array( 'fr_FR', 'fr_FR' ),
+                       array( 'fr_FR-e2791ba830489d23043be8650a22a22b', 'fr_FR-e2791ba830489d23043be8650a22a22b' ),
+                       array( '-fr_FRmo', '-fr_FR.mo' ),
+                       array( '12324', '$12324' ),
+                       array( '4124FRRa', '/4124$$$%%FRRa' ),
+                       array( 'FR', '<FR' ),
+                       array( 'FR_FR', 'FR_FR' ),
+                       array( '--__', '--__' ),
+               );
+       }
+
+       /**
+        * @dataProvider data_sanitize_locale_name_returns_empty_string
+        */
+       public function test_sanitize_locale_name_returns_empty_string( $input ) {
+               $this->assertSame( '', sanitize_locale_name( $input ) );
+       }
+
+       public function data_sanitize_locale_name_returns_empty_string() {
+               return array(
+                       // array( input )
+                       array( '$<>' ),
+                       array( '/$$$%%\\)' ),
+                       array( '....' ),
+                       array( '@///' ),
+               );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: branches/5.4/tests/phpunit/tests/formatting/sanitizeLocaleName.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span></div>

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