Cross-site scripting (XSS) vulnerability in Jenkins before 1.551 and LTS before 1.532.2 allows remote attackers to inject arbitrary web script or HTML via the iconSize cookie.
https://wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2014-02-14
https://github.com/jenkinsci/jenkins/commit/a0b00508eeb74d7033dc4100eb382df4e8fa72e7