We recently received a report via our bug bounty program that there was a potential security issue affecting PMS versions 1.41.7.x to 1.42.0.x. Thanks to that user, we were able to address the issue and continue to improve our security and defenses.
We strongly recommend that everyone have their PMS updated to the most recent version as soon as possible, if you have not already done so.
The new version, 1.42.1, is now available to update through the PMS management page or you can download it here: https://www.plex.tv/media-server-downloads/