Cross-site scripting (XSS) vulnerability in admin/global.php (aka the Admin CP login form) in MyBB (aka MyBulletinBoard) 1.1.7 allows remote attackers to inject arbitrary web script or HTML via the query string ($_SERVER[PHP_SELF]).
http://www.vupen.com/english/advisories/2006/3418
http://www.securityfocus.com/archive/1/444782/100/100/threaded
http://www.mybboard.com/archive.php?nid=18