rondocode is a client-side web app with no backend; tunes are shared purely via the URL, so there is no server to attack and no user data stored remotely.
If you find a security issue (for example, a way for a shared link to run unexpected code beyond the sandboxed audio/visual DSL), please report it privately to me@vijay.io rather than opening a public issue.
Include steps to reproduce and the affected version/commit. You'll get an acknowledgement as soon as possible, and credit in the fix if you'd like it.