jenkins is vulnerable to arbitrary code execution. Remotely authenticated users are able to execute arbitrary code using malicious XML file containing serialized data.
rhn.redhat.com/errata/RHSA-2016-1773.html
access.redhat.com/errata/RHSA-2016:0711
access.redhat.com/security/updates/classification/#important
bugzilla.redhat.com/show_bug.cgi?id=1324664
jenkins.io/changelog-stable/#v1.642.2
rhn.redhat.com/errata/RHSA-2016-0711.html
wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2016-02-24
www.contrastsecurity.com/security-influencers/serialization-must-die-act-2-xstream
www.exploit-db.com/exploits/42394/
www.exploit-db.com/exploits/43375/