Cross-site request forgery (CSRF) vulnerability in the web management interface in httpd/cgi-bin/shutdown.cgi in Smoothwall Express 3.1 and 3.0 SP3 and earlier allows remote attackers to hijack the authentication of administrators for requests that perform a reboot via a request to cgi-bin/shutdown.cgi.
The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.