Should be fixed now.

This would likely result in https://issue-tracker.miraheze.org/T13486
We are still on 1.43.3

I believe this was a request to enable MultimediaViewer, which can be done through managewiki

I've identified a security vulnerability in this extension. Given that it's currently in beta status, there may be additional security issues that haven't been discovered yet. I recommend waiting for a stable release with proper security review before deployment. This task can be revisited once the extension reaches stable status or after Miraheze has evaluated and approved it for production use.

I assume you are referencing to https://www.mediawiki.org/wiki/Extension:MultimediaViewer