A arbitrary file read vulnerability exists in Jenkins SSH Credentials Plugin 1.13 and earlier in BasicSSHUserPrivateKey.java that allows attackers with a Jenkins account and the permission to configure credential bindings to read arbitrary files from the Jenkins master file system.
github.com/jenkinsci/credentials-plugin/commit/23fbd6de33cc3cb74eafd44e7b27dd87b52c8904
github.com/jenkinsci/ssh-credentials-plugin
github.com/jenkinsci/ssh-credentials-plugin/commit/18b3121fa94a174064447d637dc11539e33b3a76
github.com/jenkinsci/ssh-credentials-plugin/commits/ssh-credentials-1.14
jenkins.io/security/advisory/2018-06-25/#SECURITY-440
nvd.nist.gov/vuln/detail/CVE-2018-1000601