Authenticated (user role) arbitrary command execution by modifying `start_cmd` setting (GHSL-2023-268)

Nginx-UI is a web interface to manage Nginx configurations. It is vulnerable to arbitrary command execution by abusing the configuration settings. The Home > Preference page exposes a list of system settings such as Run Mode, Jwt Secret, Node Secret and Terminal Start Command. While the UI doesn't allow users to modify the Terminal Start Command setting, it is possible to do so by sending a request to the API. This issue may lead to authenticated remote code execution, privilege escalation, and information disclosure. This vulnerability has been patched in version 2.0.0.beta.9.