Please see [1] for more details. Customers of Jenkins Enterprise by
CloudBees and DEV@cloud, please see the corresponding security advisory
by CloudBees [2]. While the title of the advisory is dated Jan 4th, it
is actually release today, not on Jan 4th.
For more information about security advisories and ways to get notified,
please see [3].
Unlike our typical other vulnerabilities, this one requires
administrators to take some actions after upgrading to fully plug the
problem. Once again, see the security advisory for details.