Multiple cross-site scripting (XSS) vulnerabilities in MyBB (aka MyBulletinBoard) before 1.4.1 allow remote attackers to inject arbitrary web script or HTML via (1) a certain referrer field in usercp2.php, (2) a certain location field in inc/functions_online.php, and certain (3) tsubject and (4) psubject fields in moderation.php.
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