Ticket #14169: 14169.patch

wp-app.php

@@ -1544 +1544 @@
                 else
                         $client_etag = false;
 
-                $client_last_modified = trim( $_SERVER['HTTP_IF_MODIFIED_SINCE']);
+                $client_last_modified = trim( stripslashes( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) );
                 // If string is empty, return 0. If not, attempt to parse into a timestamp
                 $client_modified_timestamp = $client_last_modified ? strtotime($client_last_modified) : 0;