Provide references for CVE-2021-21395.
Where can I find more information about CVE-2021-21395?
References are available at: https://github.com/OpenMage/magento-lts/security/advisories/GHSA-r3c9-9j5q-pwv4, https://hackerone.com/reports/1086752, https://packagist.org/packages/openmage/magento-lts.