BEA WebLogic Server 8.1 through 8.1 SP5 does not properly enforce access control after a dynamic update and dynamic redeployment of an application that is implemented through exploded jars, which allows attackers to bypass intended access restrictions.
http://www.vupen.com/english/advisories/2007/0213
http://www.securityfocus.com/bid/22082
http://securitytracker.com/id?1017525