Cross-site request forgery (CSRF) vulnerability in admin.php in Collabtive 0.6.5 allows remote attackers to hijack the authentication of administrators for requests that add administrative users via the edituser action.
http://www.anatoliasecurity.com/adv/as-adv-2010-003.txt
http://secunia.com/advisories/41805
http://packetstormsecurity.org/1010-exploits/collabtive-xssxsrf.txt