The invokeNextValve function in identity/federation/bindings/tomcat/idp/AbstractIDPValve.java in PicketLink before 2.8.0.Beta1 does not properly check role based authorization, which allows remote authenticated users to gain access to restricted application resources via a (1) direct request or (2) request through an SP initiated flow.
http://rhn.redhat.com/errata/RHSA-2015-1669.html
http://rhn.redhat.com/errata/RHSA-2015-1670.html
http://rhn.redhat.com/errata/RHSA-2015-1671.html
http://rhn.redhat.com/errata/RHSA-2015-1672.html
http://rhn.redhat.com/errata/RHSA-2015-1673.html