An issue was discovered on Enphase Envoy R3.x and D4.x (and other current) devices. The upgrade_start function in /installer/upgrade_start allows remote authenticated users to execute arbitrary commands via the force parameter.

An issue was discovered on Enphase Envoy R3.x and D4.x devices. There are hardcoded web-panel login passwords for the installer and Enphase accounts. The passwords for these accounts are hardcoded values derived from the MD5 hash of the username and serial number mixed with some static strings. The serial number can be retrieved by an unauthenticated user at /info.xml. These passwords can be easily calculated by an attacker; users are unable to change these passwords.

A weak password vulnerability was discovered in Enphase Envoy R3.*.*. One can login via TCP port 8888 with the admin password for the admin account.

A directory traversal vulnerability was discovered in Enphase Envoy R3.*.* via images/, include/, include/js, or include/css on TCP port 8888.

XSS exists in Enphase Envoy R3.*.* via the profileName parameter to the /home URI on TCP port 8888.