DocumentProvider in RESTEasy 2.3.7 and 3.0.9 does not configure the (1) external-general-entities or (2) external-parameter-entities features, which allows remote attackers to conduct XML external entity (XXE) attacks via unspecified vectors.
https://issues.jboss.org/browse/RESTEASY-1130
http://secunia.com/advisories/62580
http://rhn.redhat.com/errata/RHSA-2015-0851.html
http://rhn.redhat.com/errata/RHSA-2015-0850.html