JBoss Seam privilege escalation caused by EL interpolation in FacesMessages

jboss-seam.jar in the JBoss Seam 2 framework 2.2.x and earlier, as distributed in Red Hat JBoss Enterprise SOA Platform 4.3.0.CP04 and 5.1.0 and JBoss Enterprise Application Platform aka JBoss EAP or JBEAP 4.3.0.CP09 and 5.1.0, does not properly restrict use of Expression Language EL statements i...