Provide references for CVE-2021-39227.
Where can I find more information about CVE-2021-39227?
References are available at: https://github.com/ecomfe/zrender/security/advisories/GHSA-fhv8-fx5f-7fxf, https://github.com/ecomfe/zrender/pull/826, https://github.com/ecomfe/zrender/releases/tag/5.2.1.