Cross-site request forgery (CSRF) vulnerability in include/admin/banlist.php in Phorum before 5.1.22 allows remote attackers to perform unauthorized banlist deletions as an administrator via the delete parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/34078
http://www.vupen.com/english/advisories/2007/1479
http://www.securityfocus.com/archive/1/466286/100/0/threaded
http://www.phorum.org/story.php?76
http://securityreason.com/securityalert/2617