Provide references for CVE-2021-21273.
Where can I find more information about CVE-2021-21273?
References are available at: https://github.com/matrix-org/synapse/releases/tag/v1.25.0, https://github.com/matrix-org/synapse/security/advisories/GHSA-v936-j8gp-9q3p, https://github.com/matrix-org/synapse/pull/8821, https://github.com/matrix-org/synapse/commit/30fba6210834a4ecd91badf0c8f3eb278b72e746, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/.