Hi, thank you for the help!
Yes I did notice officially it appears it has not been updated from the extensions page.
But then I saw it seems much more active on their git repo, also by the latest code review.
I am not familiar with mediawiki extensions, or how they are dated (from repo activity or latest stable release), it may be that the old stable one is the only one available?
You are correct that there do appear to be recent updates to the extension, but most of those updates appear to be just backend maintenance and not really changing or updating the extension at all. Additionally, the MediaWiki documentation uses the most recent stable release for the "latest version" dates - just small maintenance tasks that don't change how the extension operates for the average user are usually excluded (except for major security-related changes).
So, at the end of the day, the extension is not unmaintained per se, but the fact that the latest stable release is from over 5 years ago and was designed for MediaWiki 1.25 which is no longer supported may be a blocker. Pinging our two security reviewers for a further look. @Southparkfan @Samwilson