The GateIn Portal export/import gadget in JBoss Enterprise Portal Platform 5.2.2 allows remote attackers to read arbitrary files via a crafted external XML entity in an XML document, aka an XML Entity Expansion (XEE) attack.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-0333
https://bugzilla.redhat.com/show_bug.cgi?id=913340