PHP-Post 0.21 and 1.0, and possibly earlier versions, when auto-login is enabled, allows remote attackers to bypass security restrictions and obtain administrative privileges by modifying the logincookie[user] setting in the login cookie.
secunia.com/advisories/21115
securityreason.com/securityalert/1264
www.kapda.ir/advisory-380.html
www.securityfocus.com/archive/1/440419/100/0/threaded
www.securityfocus.com/bid/19046
www.vupen.com/english/advisories/2006/2877
exchange.xforce.ibmcloud.com/vulnerabilities/27862
www.exploit-db.com/exploits/2036