CVE-2017-1000354

Jenkins versions 2.56 and earlier as well as 2.46.1 LTS and earlier are
vulnerable to a login command which allowed impersonating any Jenkins user.
The login command available in the remoting-based CLI stored the
encrypted user name of the successfully authenticated user in a cache file
used to authenticate further commands. Users with sufficient permission to
create secrets in Jenkins, and download their encrypted values (e.g. with
Job/Configure permission), were able to impersonate any other Jenkins user
on the same instance.