UniFi Video web interface Configuration Restore user privilege escalation

Summary of the issue: Low privileged UniFi Video users can abuse the Configuration Restore functionality to modify any application configuration setting, including creating new administrative users. Details: The UniFi Video Server (Windows) web interface configuration restore functionality at the “backup” and “wizard” endpoints does not implement sufficient privilege checks. Low privileged users, belonging to the PUBLIC_GROUP or CUSTOM_GROUP groups, can access these endpoints and overwrite the current application configuration. This can be abused for various purposes, including adding new administrative users. More details about this vulnerability and the fixes can be found here: https://community.ui.com/releases/Security-advisory-bulletin-006-006/3cf6264e-e0e6-4e26-a331-1d271f84673e