Agent-to-controller security bypass in Jenkins HashiCorp Vault Plugin allows reading arbitrary files

Jenkins HashiCorp Vault Plugin 336.v182c0fbaaeb7 and earlier implements functionality that allows agent processes to read arbitrary files on the Jenkins controller file system.

This allows attackers able to control agent processes to read arbitrary files on the Jenkins controller file system.

This vulnerability is only exploitable in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier. See the LTS upgrade guide.