pm.php (aka the PM system) in DeluxeBB 1.08, and possibly earlier, allows remote attackers to bypass authentication by providing an arbitrary username in the membercookie cookie parameter.Referenceshttps://exchange.xforce.ibmcloud.com/vulnerabilities/28270http://www.osvdb.org/27834http://securityreason.com/securityalert/1381http://www.securityfocus.com/archive/1/442464/100/0/threadedhttp://www.vupen.com/english/advisories/2006/3188http://secunia.com/advisories/21387http://www.securityfocus.com/bid/19418
