diff -r 48c4eec2b7e6 -r 8c2e4d02f4ef wp/wp-includes/class-IXR.php
--- a/wp/wp-includes/class-IXR.php	Fri Sep 05 18:40:08 2025 +0200
+++ b/wp/wp-includes/class-IXR.php	Fri Sep 05 18:52:52 2025 +0200
@@ -39,6 +39,11 @@
  * @license    http://www.opensource.org/licenses/bsd-license.php BSD
  */
 
+// Don't load directly.
+if ( ! defined( 'ABSPATH' ) ) {
+	die( '-1' );
+}
+
 require_once ABSPATH . WPINC . '/IXR/class-IXR-server.php';
 
 require_once ABSPATH . WPINC . '/IXR/class-IXR-base64.php';