Ticket #44274: template.php.patch

template.php

@@ -1099 +1099 @@
 
         $hidden = get_hidden_meta_boxes( $screen );
 
-        printf( '<div id="%s-sortables" class="meta-box-sortables">', htmlspecialchars( $context ) );
+        printf( '<div id="%s-sortables" class="meta-box-sortables">', esc_attr( $context ) );
 
         // Grab the ones the user has manually sorted. Pull them out of their previous context/priority and into the one the user chose
         if ( ! $already_sorted && $sorted = get_user_option( "meta-box-order_$page" ) ) {