Changeset 61957 for branches/5.3/src/wp-includes/kses.php

Timestamp:

03/12/2026 02:24:56 AM (6 months ago)

Author:

peterwilsoncc

Message:

Grouped backports for the 5.3 branch.

• XML-RPC: Switch to wp_safe_remote() when fetching a pingback URL.
• HTML API: Prevent WP_HTML_Tag_Processor instances being unserialized and add some extra logic for validating pattern and template file paths.
• KSES: Optimize PCRE pattern detecting numeric character references.
• Customize: Improve escaping approach used for nav menu attributes.
• Media: Ensure the attachment parent is accessible to the user before showing a link to it in the media manager.
• Administration: Ensure client-side templates are only detected when they're correctly associated with a script tag.
• Filesystem API: Don't attempt to extract invalid files from a zip when using the PclZip library.

Merges [61879-61885,61887,61890,61913] to the 5.3 branch.

Props johnbillion, xknown, dmsnell, jorbin, peterwilson, desrosj, westonruter, jonsurrell, aurdasjb.

Location:

branches/5.3

Files:

• . (modified) (1 prop)
• src/wp-includes/kses.php (modified) (1 diff)

branches/5.3/src/wp-includes/kses.php

@@ -1735 +1735 @@
         $string = str_replace( '&', '&', $string );
 
-        // Change back the allowed entities in our entity whitelist
         $string = preg_replace_callback( '/&([A-Za-z]{2,8}[0-9]{0,2});/', 'wp_kses_named_entities', $string );
-        $string = preg_replace_callback( '/&#(0*[0-9]{1,7});/', 'wp_kses_normalize_entities2', $string );
-        $string = preg_replace_callback( '/&#[Xx](0*[0-9A-Fa-f]{1,6});/', 'wp_kses_normalize_entities3', $string );
+        $string = preg_replace_callback( '/&#(0*[1-9][0-9]{0,6});/', 'wp_kses_normalize_entities2', $string );
+        $string = preg_replace_callback( '/&#[Xx](0*[1-9A-Fa-f][0-9A-Fa-f]{0,5});/', 'wp_kses_normalize_entities3', $string );
 
         return $string;