Cross-site scripting (XSS) vulnerability in httpd/cgi-bin/vpn.cgi/vpnconfig.dat in Smoothwall Express 3.0 SP3 allows remote attackers to inject arbitrary web script or HTML via the COMMENT parameter in an Add action.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.