BEA WebLogic Server and Express 7.0 and 7.0.0.1, when running Servlets and Enterprise JavaBeans (EJB) on more than one server, will remove the security constraints and roles on all servers for any Servlets or EJB that are used by an application that is undeployed on one server, which could allow remote attackers to conduct unauthorized activities in violation of the intended restrictions.

An undocumented extension for the Servlet mappings in the Servlet 2.3 specification, when upgrading to WebLogic Server and Express 7.0 Service Pack 1 from BEA WebLogic Server and Express 6.0 through 7.0.0.1, does not prepend a "/" character in certain URL patterns, which prevents the proper enforcement of role mappings and policies in applications that use the extension.

BEA WebLogic Server and Express 6.1 through 7.0.0.1 buffers HTTP requests in a way that can cause BEA to send the same response for two different HTTP requests, which could allow remote attackers to obtain sensitive information that was intended for other users.