Ticket #24354: 24354.diff

wp-includes/category.php

@@ -169 +169 @@
  * @return int 0, if failure and ID of category on success.
  */
 function get_cat_ID( $cat_name ) {
+        $cat_name = _wp_specialchars( $cat_name ); // get_term_by expects $cat_name to be escaped
         $cat = get_term_by( 'name', $cat_name, 'category' );
         if ( $cat )
                 return $cat->term_id;