source: https://www.securityfocus.com/bid/69109/info

VoipSwitch 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. 

https://www.example.com/user.php?action=../../../windows/win.ini%00.jpg