IBM Business Process Manager (BPM) 7.5.x through 8.5.5 and WebSphere Lombardi Edition 7.2.x allow remote authenticated users to bypass intended access restrictions and send requests to internal services via a callService URL.
https://exchange.xforce.ibmcloud.com/vulnerabilities/94485
http://www-01.ibm.com/support/docview.wss?uid=swg21680795