What to include: the version (jss --version or package.json), the request or steps that show the problem, and the fix you would make if you have one.
What happens next: we confirm against the code, open an issue, fix it in a pull request that names the reporter (unless you ask not to be named), and release. Past audits are in SECURITY-AUDIT-*.md.
Scope: anything in this repository. Deployments, plugins and client libraries have their own repositories.