WWBN AVideo is an open source video platform. Prior to version 26.0, the "deleteDump" parameter in "plugin/CloneSite/cloneServer.json.php" is passed directly to "unlink()" without any path sanitization. An attacker with valid clone credentials can use path traversal sequences (e.g., "../../") to delete arbitrary files on the server, including critical application files such as "configuration.php", causing complete denial of service or enabling further attacks by removing security-critical files. Version 26.0 fixes the issue.