Ubiquiti UCRM versions 2.3.0 to 2.7.7 allow an authenticated user to read arbitrary files in the local file system. Note that by default, the local file system is isolated in a docker container. Successful exploitation requires valid credentials to an account with "Edit" access to "System Customization".
https://hackerone.com/reports/301406
https://community.ubnt.com/t5/UCRM/New-UCRM-upgrades-available-2-8-2-and-2-9-0-beta3/td-p/2211814