Multiple cross-site scripting (XSS) vulnerabilities in admincp/index.php in Jelsoft vBulletin 3.6.x allow remote attackers to inject arbitrary web script or HTML via (1) the prefs parameter in a buildnavprefs action or (2) the navprefs parameter in a savenavprefs action.
https://exchange.xforce.ibmcloud.com/vulnerabilities/30408
http://www.vupen.com/english/advisories/2006/4599
http://www.vbulletin.com/forum/showthread.php?postid=1256434
http://www.securityfocus.com/archive/1/451959/100/0/threaded