Provide references for CVE-2021-21238.
Where can I find more information about CVE-2021-21238?
References are available at: https://pypi.org/project/pysaml2, https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0, https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-jgv9, https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef8f048157cc14.