Provide references for CVE-2021-21336.
Where can I find more information about CVE-2021-21336?
References are available at: https://github.com/zopefoundation/Products.PluggableAuthService/security/advisories/GHSA-p75f-g7gx-2r7p, https://pypi.org/project/Products.PluggableAuthService/, https://github.com/zopefoundation/Products.PluggableAuthService/commit/2dad81128250cb2e5d950cddc9d3c0314a80b4bb, http://www.openwall.com/lists/oss-security/2021/05/21/1, http://www.openwall.com/lists/oss-security/2021/05/22/1.