Provide references for CVE-2019-16216.
Where can I find more information about CVE-2019-16216?
References are available at: https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/, https://github.com/zulip/zulip/commit/1195841dfb9aa26b3b0dabc6f05d72e4af25be3e.