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<title>[47960] branches/5.2: General: Backport several commits for release.</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/47960">47960</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/47960","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>desrosj</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2020-06-10 18:11:24 +0000 (Wed, 10 Jun 2020)</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'>General: Backport several commits for release.

- Embeds: Ensure that the title attribute is set correctly on embeds.
- Editor: Prevent HTML decoding on by setting the proper editor context.
- Formatting: Ensure that wp_validate_redirect() sanitizes a wider variety of characters.
- Themes: Ensure a broken theme name is returned properly.
- Administration: Add a new filter to extend set-screen-option. 

Merges [47948-47951] to the 5.2 branch.
Props xknown, sstoqnov, vortfu, SergeyBiryukov, whyisjake.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branches52srcwpadminincludesmediaphp">branches/5.2/src/wp-admin/includes/media.php</a></li>
<li><a href="#branches52srcwpadminincludesmiscphp">branches/5.2/src/wp-admin/includes/misc.php</a></li>
<li><a href="#branches52srcwpadminthemesphp">branches/5.2/src/wp-admin/themes.php</a></li>
<li><a href="#branches52srcwpincludesdefaultfiltersphp">branches/5.2/src/wp-includes/default-filters.php</a></li>
<li><a href="#branches52srcwpincludesembedphp">branches/5.2/src/wp-includes/embed.php</a></li>
<li><a href="#branches52srcwpincludespluggablephp">branches/5.2/src/wp-includes/pluggable.php</a></li>
<li><a href="#branches52testsphpunittestsoembedfilterResultphp">branches/5.2/tests/phpunit/tests/oembed/filterResult.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="branches52srcwpadminincludesmediaphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.2/src/wp-admin/includes/media.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.2/src/wp-admin/includes/media.php      2020-06-10 17:58:07 UTC (rev 47959)
+++ branches/5.2/src/wp-admin/includes/media.php        2020-06-10 18:11:24 UTC (rev 47960)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3057,7 +3057,7 @@
</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">        </label>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        <?php wp_editor( $post->post_content, 'attachment_content', $editor_args ); ?>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ <?php wp_editor( format_to_edit( $post->post_content ), 'attachment_content', $editor_args ); ?>
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        </div>
</span><span class="cx" style="display: block; padding: 0 10px">        <?php
</span></span></pre></div>
<a id="branches52srcwpadminincludesmiscphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.2/src/wp-admin/includes/misc.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.2/src/wp-admin/includes/misc.php       2020-06-10 17:58:07 UTC (rev 47959)
+++ branches/5.2/src/wp-admin/includes/misc.php 2020-06-10 18:11:24 UTC (rev 47960)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -639,23 +639,46 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="cx" style="display: block; padding: 0 10px">                                break;
</span><span class="cx" style="display: block; padding: 0 10px">                        default:
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                if ( '_page' === substr( $option, -5 ) || 'layout_columns' === $option ) {
+                                       /**
+                                        * Filters a screen option value before it is set.
+                                        *
+                                        * The filter can also be used to modify non-standard [items]_per_page
+                                        * settings. See the parent function for a full list of standard options.
+                                        *
+                                        * Returning false to the filter will skip saving the current option.
+                                        *
+                                        * @since 2.8.0
+                                        * @since 5.4.2 Only applied to options ending with '_page',
+                                        *              or the 'layout_columns' option.
+                                        *
+                                        * @see set_screen_options()
+                                        *
+                                        * @param bool   $keep   Whether to save or skip saving the screen option value.
+                                        *                       Default false.
+                                        * @param string $option The option name.
+                                        * @param int    $value  The number of rows to use.
+                                        */
+                                       $value = apply_filters( 'set-screen-option', false, $option, $value ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
+                               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                                 /**
</span><span class="cx" style="display: block; padding: 0 10px">                                 * Filters a screen option value before it is set.
</span><span class="cx" style="display: block; padding: 0 10px">                                 *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                 * The filter can also be used to modify non-standard [items]_per_page
-                                * settings. See the parent function for a full list of standard options.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                          * The dynamic portion of the hook, `$option`, refers to the option name.
</ins><span class="cx" style="display: block; padding: 0 10px">                                  *
</span><span class="cx" style="display: block; padding: 0 10px">                                 * Returning false to the filter will skip saving the current option.
</span><span class="cx" style="display: block; padding: 0 10px">                                 *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                 * @since 2.8.0
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                          * @since 5.4.2
</ins><span class="cx" style="display: block; padding: 0 10px">                                  *
</span><span class="cx" style="display: block; padding: 0 10px">                                 * @see set_screen_options()
</span><span class="cx" style="display: block; padding: 0 10px">                                 *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                 * @param bool     $keep   Whether to save or skip saving the screen option value. Default false.
-                                * @param string   $option The option name.
-                                * @param int      $value  The number of rows to use.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                          * @param bool   $keep   Whether to save or skip saving the screen option value.
+                                *                       Default false.
+                                * @param string $option The option name.
+                                * @param int    $value  The number of rows to use.
</ins><span class="cx" style="display: block; padding: 0 10px">                                  */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                $value = apply_filters( 'set-screen-option', false, $option, $value );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         $value = apply_filters( "set_screen_option_{$option}", false, $option, $value );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                                if ( false === $value ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                        return;
</span></span></pre></div>
<a id="branches52srcwpadminthemesphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.2/src/wp-admin/themes.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.2/src/wp-admin/themes.php      2020-06-10 17:58:07 UTC (rev 47959)
+++ branches/5.2/src/wp-admin/themes.php        2020-06-10 18:11:24 UTC (rev 47960)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -396,7 +396,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">        </tr>
</span><span class="cx" style="display: block; padding: 0 10px">        <?php foreach ( $broken_themes as $broken_theme ) : ?>
</span><span class="cx" style="display: block; padding: 0 10px">                <tr>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        <td><?php echo $broken_theme->get( 'Name' ) ? $broken_theme->display( 'Name' ) : $broken_theme->get_stylesheet(); ?></td>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 <td><?php echo $broken_theme->get( 'Name' ) ? $broken_theme->display( 'Name' ) : esc_html( $broken_theme->get_stylesheet() ); ?></td>
</ins><span class="cx" style="display: block; padding: 0 10px">                         <td><?php echo $broken_theme->errors()->get_error_message(); ?></td>
</span><span class="cx" style="display: block; padding: 0 10px">                        <?php
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( $can_resume ) {
</span></span></pre></div>
<a id="branches52srcwpincludesdefaultfiltersphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.2/src/wp-includes/default-filters.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.2/src/wp-includes/default-filters.php  2020-06-10 17:58:07 UTC (rev 47959)
+++ branches/5.2/src/wp-includes/default-filters.php    2020-06-10 18:11:24 UTC (rev 47960)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -573,8 +573,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'the_excerpt_embed', 'shortcode_unautop' );
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'the_excerpt_embed', 'wp_embed_excerpt_attachment' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+add_filter( 'oembed_dataparse', 'wp_filter_oembed_iframe_title_attribute', 5, 3 );
</ins><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'oembed_dataparse', 'wp_filter_oembed_result', 10, 3 );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-add_filter( 'oembed_dataparse', 'wp_filter_oembed_iframe_title_attribute', 20, 3 );
</del><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'oembed_response_data', 'get_oembed_response_data_rich', 10, 4 );
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'pre_oembed_result', 'wp_filter_pre_oembed_result', 10, 3 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="branches52srcwpincludesembedphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.2/src/wp-includes/embed.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.2/src/wp-includes/embed.php    2020-06-10 17:58:07 UTC (rev 47959)
+++ branches/5.2/src/wp-includes/embed.php      2020-06-10 18:11:24 UTC (rev 47960)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -797,13 +797,26 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        $title = ! empty( $data->title ) ? $data->title : '';
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $pattern        = '`<iframe[^>]*?title=(\\\\\'|\\\\"|[\'"])([^>]*?)\1`i';
-       $has_title_attr = preg_match( $pattern, $result, $matches );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $pattern = '`<iframe([^>]*)>`i';
+       if ( preg_match( $pattern, $result, $matches ) ) {
+               $attrs = wp_kses_hair( $matches[1], wp_allowed_protocols() );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( $has_title_attr && ! empty( $matches[2] ) ) {
-               $title = $matches[2];
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         foreach ( $attrs as $attr => $item ) {
+                       $lower_attr = strtolower( $attr );
+                       if ( $lower_attr === $attr ) {
+                               continue;
+                       }
+                       if ( ! isset( $attrs[ $lower_attr ] ) ) {
+                               $attrs[ $lower_attr ] = $item;
+                               unset( $attrs[ $attr ] );
+                       }
+               }
</ins><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 ( ! empty( $attrs['title']['value'] ) ) {
+               $title = $attrs['title']['value'];
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         /**
</span><span class="cx" style="display: block; padding: 0 10px">         * Filters the title attribute of the given oEmbed HTML iframe.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -820,11 +833,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                return $result;
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( $has_title_attr ) {
-               // Remove the old title, $matches[1]: quote, $matches[2]: title attribute value.
-               $result = str_replace( ' title=' . $matches[1] . $matches[2] . $matches[1], '', $result );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( isset( $attrs['title'] ) ) {
+               unset( $attrs['title'] );
+               $attr_string = join( ' ', wp_list_pluck( $attrs, 'whole' ) );
+               $result      = str_replace( $matches[0], '<iframe ' . trim( $attr_string ) . '>', $result );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
</del><span class="cx" style="display: block; padding: 0 10px">         return str_ireplace( '<iframe ', sprintf( '<iframe title="%s" ', esc_attr( $title ) ), $result );
</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="branches52srcwpincludespluggablephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.2/src/wp-includes/pluggable.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.2/src/wp-includes/pluggable.php        2020-06-10 17:58:07 UTC (rev 47959)
+++ branches/5.2/src/wp-includes/pluggable.php  2020-06-10 18:11:24 UTC (rev 47960)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1374,9 +1374,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * @return string redirect-sanitized URL
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        function wp_validate_redirect( $location, $default = '' ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $location = trim( $location, " \t\n\r\0\x08\x0B" );
-               // browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'
-               if ( substr( $location, 0, 2 ) == '//' ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $location = wp_sanitize_redirect( trim( $location, " \t\n\r\0\x08\x0B" ) );
+               // Browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'.
+               if ( '//' === substr( $location, 0, 2 ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                         $location = 'http:' . $location;
</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="branches52testsphpunittestsoembedfilterResultphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.2/tests/phpunit/tests/oembed/filterResult.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.2/tests/phpunit/tests/oembed/filterResult.php  2020-06-10 17:58:07 UTC (rev 47959)
+++ branches/5.2/tests/phpunit/tests/oembed/filterResult.php    2020-06-10 18:11:24 UTC (rev 47960)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -102,4 +102,38 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( '<blockquote class="wp-embedded-content"></blockquote><iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted"></iframe>', $actual );
</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 _data_oembed_test_strings() {
+               return array(
+                       array(
+                               '<blockquote></blockquote><iframe title=""></iframe>',
+                               '<blockquote class="wp-embedded-content"></blockquote><iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; clip: rect(1px, 1px, 1px, 1px);" title="Hola"></iframe>',
+                       ),
+                       array(
+                               '<blockquote class="foo" id="bar"><strong><a href="" target=""></a></strong></blockquote><iframe width=123></iframe>',
+                               '<blockquote class="wp-embedded-content"><a href=""></a></blockquote><iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; clip: rect(1px, 1px, 1px, 1px);" title="Hola" width="123"></iframe>',
+                       ),
+                       array(
+                               '<blockquote><iframe width="100"></iframe></blockquote><iframe stitle="aaaa"></iframe>',
+                               '<blockquote class="wp-embedded-content"><iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; clip: rect(1px, 1px, 1px, 1px);" title="Hola" width="100"></iframe></blockquote><iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; clip: rect(1px, 1px, 1px, 1px);" title="Hola"></iframe>',
+                       ),
+                       array(
+                               "<blockquote><iframe title=' width=\"'></iframe></blockquote><iframe title='' height=' title=' width=\"'' heigt='123'\"></iframe>",
+                               '<blockquote class="wp-embedded-content"><iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; clip: rect(1px, 1px, 1px, 1px);" title=" width=&quot;"></iframe></blockquote><iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; clip: rect(1px, 1px, 1px, 1px);" title=" width=&quot;" height=\' title=\' width="\'\' heigt=\'123\'"></iframe>',
+                       ),
+               );
+       }
+
+       /**
+        * @dataProvider _data_oembed_test_strings
+        */
+       public function test_wp_filter_pre_oembed_custom_result( $html, $expected ) {
+               $data   = (object) [
+                       'type'  => 'rich',
+                       'title' => 'Hola',
+                       'html'  => $html,
+               ];
+               $actual = _wp_oembed_get_object()->data2html( $data, 'https://untrusted.localhost' );
+               $this->assertEquals( $expected, $actual );
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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