Provide references for CVE-2021-3980.
Where can I find more information about CVE-2021-3980?
References are available at: https://huntr.dev/bounties/1f43f11e-4bd8-451f-a244-dc9541cdc0ac, https://github.com/elgg/elgg/commit/572d210e2392f1fdf47ff2f38665372a6535c126.