A vulnerability was found in Ansible Tower before 3.6.1 where an attacker with low privilege could retrieve usernames and passwords credentials from the new RHSM saved in plain text into the database at '/api/v2/config' when applying the Ansible Tower license.
Red Hat Security Advisory 2019-3958-01 - Ansible Tower version 3.6.1 suffers from accidental disclosure of username and password amongst other security issues.