Zenoss Core through 5 Beta 3 allows remote authenticated users to obtain sensitive (1) user account, (2) e-mail address, and (3) role information by visiting the ZenUsers (aka User Manager) page, aka ZEN-15389.
https://docs.google.com/spreadsheets/d/1dHAc4PxUbs-4Dxzm1wSCE0sMz5UCMY6SW3PlMHSyuuQ/edit?usp=sharing