The AuthCache purge implementation in the Security component in IBM WebSphere Application Server (WAS) 6.1.0.x before 6.1.0.37 and 7.x before 7.0.0.15 does not purge a user from the PlatformCredential cache, which might allow remote authenticated users to gain privileges by leveraging a group membership specified in an old RACF Object (aka RACO).
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.