Provide references for CVE-2021-39230.
Where can I find more information about CVE-2021-39230?
References are available at: https://github.com/FrankEnderman/Butter/security/advisories/GHSA-4538-4g86-xf6j, https://github.com/FrankEnderman/Butter/commit/a4fd717e848306f04f2823ea5f617e4da9f5bbdb.