Ticket #59718: patch.patch

wp-includes/rest-api/endpoints/class-wp-rest-global-styles-controller.php

@@ -695 +695 @@
          * @param string $css CSS to validate.
          * @return true|WP_Error True if the input was validated, otherwise WP_Error.
          */
-        protected function validate_custom_css( $css ) {
+        private function validate_custom_css( $css ) {
                 if ( preg_match( '#</?\w+#', $css ) ) {
                         return new WP_Error(
                                 'rest_custom_css_illegal_markup',