Directory traversal vulnerability in the bitrix.xscan module before 1.0.4 for Bitrix allows remote authenticated users to rename arbitrary files, and consequently obtain sensitive information or cause a denial of service, via a .. (dot dot) in the file parameter to admin/bitrix.xscan_worker.php.
https://www.exploit-db.com/exploits/38976/
https://marketplace.1c-bitrix.ru/solutions/bitrix.xscan/#tab-log-link
http://www.securityfocus.com/archive/1/537072/100/0/threaded