Ticket #44832: wp-embed-patch.44832.diff

wp-includes/js/wp-embed.js

@@ -29 +29 @@
 
         window.wp.receiveEmbedMessage = function( e ) {
                 var data = e.data;
-                if ( ! ( data.secret || data.message || data.value ) ) {
+                if ( ! data || ! ( data.secret || data.message || data.value ) ) {
                         return;
                 }