An authentication bypass vulnerability exists in the Green Electronics RainMachine Mini-8 (2nd Generation) and Touch HD 12 web application allowing an unauthenticated attacker to perform authenticated actions on the device via a 127.0.0.1:port value in the HTTP 'Host' header, as demonstrated by retrieving credentials.

The 'Weather Service' feature of the Green Electronics RainMachine Mini-8 (2nd generation) allows an attacker to inject arbitrary Python code via the 'Add new weather data source' upload function.

The time-based one-time-password (TOTP) function in the application logic of the Green Electronics RainMachine Mini-8 (2nd generation) uses the administrator's password hash to generate a 6-digit temporary passcode that can be used for remote and local access, aka a "Use of Password Hash Instead of Password for Authentication" issue. This is exploitable by an attacker who discovers a hash value in the rainmachine-settings.sqlite file.