We're currently sitting at version 3.2.9. Version 3.3.3 is the latest available and there have been *several security releases* since we last upgraded.
I'm told that RT #6674 (https://rt.wikimedia.org/Ticket/Display.html?id=6674) is related to this as well.
Version: wmf-deployment
Severity: enhancement
URL: https://www.otrs.com/try/