Ticket #23377: 23377.patch

wp-includes/capabilities.php

@@ -993 +993 @@
 function map_meta_cap( $cap, $user_id ) {
         $args = array_slice( func_get_args(), 2 );
         $caps = array();
-
+        
+        if ( ! isset( $args[0] ) ) {
+                global $post;
+                if ( is_object( $post ) ) {
+                        $args[0] = $post->ID;
+                }
+                else {
+                        $args[0] = $_POST['post_ID'];
+                }
+        }
+        
         switch ( $cap ) {
         case 'remove_user':
                 $caps[] = 'remove_users';