Cross-site request forgery (CSRF) vulnerability in the WebGUI in FreeNAS before 0.7RC1 allows remote attackers to hijack the authentication of users for unspecified requests via unknown vectors.
http://www.ipa.go.jp/security/vuln/documents/2009/200908_freenas.html
http://www.freenas.org/index.php?option=com_frontpage&Itemid=22