Multiple cross-site scripting (XSS) vulnerabilities pm_popup.php in MKPortal 1.1 Rc1 and earlier, as used with vBulletin 3.5.4 and earlier, allow remote attackers to inject arbitrary web script or HTML via the (1) u1, (2) m1, (3) m2, (4) m3, (5) m4 parameters.
secunia.com/advisories/19786
securityreason.com/securityalert/801
securitytracker.com/id?1015977
www.nukedx.com/?viewdoc=26
www.osvdb.org/24901
www.securityfocus.com/archive/1/431759/100/0/threaded
www.securityfocus.com/archive/1/447195/100/0/threaded
www.securityfocus.com/archive/1/447303/100/0/threaded
www.securityfocus.com/bid/17651
www.securityfocus.com/bid/20232
www.vupen.com/english/advisories/2006/1485