source: https://www.securityfocus.com/bid/59298/info

Fork CMS is prone to a local file-include vulnerability because it fails to sufficiently sanitize user-supplied input.

An attacker can exploit this vulnerability to view files and execute local scripts in the context of the web server process. This may aid in further attacks. 

http://www.example.com/frontend/js.php?module=core&file=../../../../../../../../../../../../../../../../etc/passwd&language=en&m=1339527371