We've released new versions of Jenkins today to fix several security vulnerabilities.
These vulnerabilities affect all previous releases:
- mainline releases up to and including 2.2
- LTS releases up to and including 1.651.1
We recommend updating to the new releases:
- mainline 2.3
- LTS 1.651.2
Please see the advisory for more details:
https://wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2016-05-11