Code Akos holds GitHub tokens and can push code, so security reports matter.
Do not open a public issue for a vulnerability. Email ayesh.rehman@live.com with what you found, the version (package.json) and steps to reproduce. Expect an acknowledgement; there is one maintainer, so fixes are handled on a best-effort basis.
Supported version: the latest release.
The security model (loopback binding, token cookie, encrypted GitHub tokens, what the check command can do) is described in docs/reference.md.