The WSEE runtime (WS-Security runtime) in BEA WebLogic Server 9.0 and 9.1 does not verify credentials when decrypting client messages, which allows remote attackers to bypass application security.
http://www.vupen.com/english/advisories/2007/0213
http://www.securityfocus.com/bid/22082
http://securitytracker.com/id?1017525