OMEGA (aka Omegasoft) INterneSErvicesLosungen (INSEL) 7 supports authentication with a cookie that lacks a shared secret, which allows remote attackers to login as an arbitrary user via a modified cookie.
https://exchange.xforce.ibmcloud.com/vulnerabilities/39575
http://www.securityfocus.com/bid/27210
http://www.securityfocus.com/archive/1/486009/100/0/threaded