A Portal to a Portal

IBM has identified a serious vulnerability in IBM WebSphere Portal in an authentication component that makes it possible for remote attackers over the network to bypass normal WebSphere Portal server security. Through this attack, an intruder might be able to execute administrative commands without proper authority. 

Please see http://www-01.ibm.com/support/docview.wss?rs=688&uid=swg21369956 for further information.