source: http://www.securityfocus.com/bid/60172/info

Barracuda SSL VPN 680 is prone to an open-redirection vulnerability.

An attacker can leverage this issue by constructing a crafted URI and enticing a user to follow it. When an unsuspecting victim follows the link, they may be redirected to an attacker-controlled site; this may aid in phishing attacks. Other attacks are possible.

Barracuda SSL VPN 680 2.2.2.203 is vulnerable; other versions may also be affected. 

https://www.example.com/launchApplication.do?resourceId=1&policy=1&returnTo=%2FshowApplicationShortcuts.do
https://www.exmaple.com/launchApplication.do?resourceId=1&policy=1&returnTo=http://www.example.com
https://www.exmaple.com/[FILE].do?[RES+ID]=x&[POLICY]=x&returnTo=[EXTERNAL TARGET]