In Supervisor through 4.0.2, an unauthenticated user can read log files or restart a service. Note: The maintainer responded that the affected component, inet_http_server, is not enabled by default but if the user enables it and does not set a password, Supervisor logs a warning message. The maintainer indicated the ability to run an open server will not be removed but an additional warning was added to the documentation
https://github.com/Supervisor/supervisor/issues/1245
https://github.com/Supervisor/supervisor/commit/4e334d9cf2a1daff685893e35e72398437df3dcb
http://supervisord.org/configuration.html#inet-http-server-section-settings