Provide references for CVE-2021-43791.
Where can I find more information about CVE-2021-43791?
References are available at: https://github.com/zulip/zulip/security/advisories/GHSA-wj76-pcqr-mf9f, https://github.com/zulip/zulip/commit/a014ef75a3a0ed7f24ebb157632ba58751e732c6.