I wasn't aware of security issues and I'm currently using this proxy manager, do you have a good alternative?

Care to elaborate on both counts? I’ve been using it for years and have had no auth issues in my use case at least. I mainly use it inside lan only though I do have a firewalled instance for a couple public services I host, but I haven’t heard of any security issues, I sort of assumed it had a similar attack surface as regular Nginx as that’s basically all it is.

I looked at the issues for the github project, and it's a cesspool of "doesn't work". I can't imagine being the maintainer and having to wade through that.

https://github.com/NginxProxyManager/nginx-proxy-manager/iss...

This seems to be the security vulnerability, with no details.