Ticket #21386: 21386.diff

src/wp-includes/class-wp-xmlrpc-server.php

@@ -811 +811 @@
                         '_builtin' => (bool) $post_type->_builtin,
                         'has_archive' => (bool) $post_type->has_archive,
                         'supports' => get_all_post_type_supports( $post_type->name ),
+                        'user_can_create' => current_user_can( $post_type->cap->create_posts ),
+                        'user_can_edit' => current_user_can( $post_type->cap->edit_posts ),
+                        'user_can_publish' => current_user_can( $post_type->cap->publish_posts ),
                 );
 
                 if ( in_array( 'labels', $fields ) ) {