The XSLT component in Apache Camel before 2.11.4 and 2.12.x before 2.12.3 allows remote attackers to read arbitrary files and possibly have other unspecified impact via an XML document containing an external entity declaration in conjunction with an entity reference, related to an XML External Entity (XXE) issue.
http://www.securityfocus.com/bid/65901
http://secunia.com/advisories/57719
http://secunia.com/advisories/57716
http://secunia.com/advisories/57125