Provide references for CVE-2021-21337.
Where can I find more information about CVE-2021-21337?
References are available at: https://pypi.org/project/Products.PluggableAuthService/, https://github.com/zopefoundation/Products.PluggableAuthService/security/advisories/GHSA-p44j-xrqg-4xrr, https://github.com/zopefoundation/Products.PluggableAuthService/commit/7eead067898852ebd3e0f143bc51295928528dfa, http://packetstormsecurity.com/files/162911/Products.PluggableAuthService-2.6.0-Open-Redirect.html.