source: http://www.securityfocus.com/bid/38630/info

Max Network Technology BBSMAX is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input.

An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookie-based authentication credentials and to launch other attacks.

Max Network Technology BBSMAX 4.2 is vulnerable; other versions may also be affected. 

http://www.example.com/forum1/post.aspx?action=reply&threadid="><script>alert(/liscker/);</script>