Provide references for CVE-2021-43799.
Where can I find more information about CVE-2021-43799?
References are available at: https://github.com/zulip/zulip/security/advisories/GHSA-p663-wxvv-2fjp, https://github.com/zulip/zulip/commit/a5496f4098e3998c9b84e8dc564aa983d6cdf6e8, https://github.com/gteissier/erl-matter, https://github.com/zulip/zulip/releases/tag/4.9.