Red Hat Security Advisory 2016-0121-01 - Red Hat JBoss Enterprise Application Platform 6 is a platform for Java applications based on JBoss Application Server 7. The following security issue is addressed with this release: It was found that the Java Standard Tag Library allowed the processing of untrusted XML documents to utilize external entity references, which could access resources on the host system and, potentially, allowing arbitrary code execution.
6a49c421651ed74730de510b63c6f28751fd3d66c18041a4b8b9ef9acc7e56a1