Ticket #20986: 20986.2.patch

wp-includes/class-IXR.php

@@ -369 +369 @@
     {
         if (!$data) {
             if (isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] !== 'POST') {
-                header('Content-Type: text/plain'); // merged from WP #9093
+                status_header( 405 );
+                header('Allow: POST');
+                header('Content-Type: text/plain'); // merged from WP #9093
                 die('XML-RPC server accepts POST requests only.');
             }