Despite the fact that this is a game which does not store any personal data, security bugs may occur in this software directly or through its dependencies.
Currently, there is only one version to be supported, this is the latest released version. This includes security fixes which will be published as soon as possible and with high priority. If possible, a release fixing only (security) bugs will be published.
Report any vulnerabilities via mail to meikpiepmeyergmailcom. You will reach the main developer there and can rely to get a ping soon that the developer is aware of the topic. This includes next steps, further questions or whatever is needed.