source: https://www.securityfocus.com/bid/31888/info

SiteEngine is prone to a remote URI-redirection vulnerability because the application fails to properly sanitize user-supplied input.

A successful exploit may aid in phishing-style attacks.

SiteEngine 5.0 is vulnerable; other versions may also be affected.

http://www.example.com/api.php?action=logout&forward=http://www.example2.com