Oracle Mojarra 2.1.7 does not properly "clean up" the FacesContext reference during startup, which allows local users to obtain context information an access resources from another WAR file by calling the FacesContext.getCurrentInstance function.
https://issues.jboss.org/browse/JBPAPP-9197
https://exchange.xforce.ibmcloud.com/vulnerabilities/76179
http://www.openwall.com/lists/oss-security/2012/06/07/3
http://www.openwall.com/lists/oss-security/2012/06/07/2
http://secunia.com/advisories/51607
http://secunia.com/advisories/49284
http://rhn.redhat.com/errata/RHSA-2012-1594.html