Puppet Enterprise 2016.4.x prior to 2016.4.12, Puppet Enterprise 2017.3.x prior to 2017.3.7, Puppet Enterprise 2018.1.x prior to 2018.1.1, Puppet Agent 1.10.x prior to 1.10.13, Puppet Agent 5.3.x prior to 5.3.7, and Puppet Agent 5.5.x prior to 5.5.2, were vulnerable to an attack where an unprivileged user on Windows agents could write custom facts that can escalate privileges on the next puppet run. This was possible through the loading of shared libraries from untrusted paths.

Puppet Enterprise 2017.3.x prior to 2017.3.3 are vulnerable to a remote execution bug when a specially crafted string was passed into the factertask or puppetconf tasks. This vulnerability only affects tasks in the affected modules, if you are not using puppet tasks you are not affected by this vulnerability.