Because we don't have clear release cycle yet, support is only provided to the latest engine versions from master branch. You can use host_ver command in console to fetch detailed info about the engine build.

If you discover a security vulnerability in this project, it can be reported privately though Security tab on GitHub: https://github.com/FWGS/xash3d-fwgs/security

Alternatively, you can report them publicly on the Issues tab: https://github.com/FWGS/xash3d-fwgs/issues

In both cases, expect a reply within approximately a week.