moderation.php in MyBB (aka MyBulletinBoard) before 1.4.1 does not properly check for moderator privileges, which has unknown impact and remote attack vectors.
http://www.securityfocus.com/bid/31104
http://www.openwall.com/lists/oss-security/2008/09/09/9
http://www.openwall.com/lists/oss-security/2008/09/09/1
http://secunia.com/advisories/31760