Admin/adpoll.asp in PacPoll 4.0 and earlier allows remote attackers to bypass authentication by setting the polllog cookie value to "xx".
https://exchange.xforce.ibmcloud.com/vulnerabilities/29801
http://www.vupen.com/english/advisories/2006/4208
http://www.securityfocus.com/bid/20742
http://www.securityfocus.com/archive/1/449668/100/0/threaded
http://www.kapda.ir/advisory-445.html