The input control in PasswordParameterDefinition in Jenkins before 1.551 and LTS before 1.532.2 allows remote attackers to obtain passwords by reading the HTML source code, related to the default value.
https://wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2014-02-14
https://github.com/jenkinsci/jenkins/commit/bf539198564a1108b7b71a973bf7de963a6213ef