Provide references for CVE-2018-16515.
Where can I find more information about CVE-2018-16515?
References are available at: https://github.com/matrix-org/synapse/issues/3796#event-1833126269, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IRW7YR2H3ASUSYX4AO4KMY3FNVDNYW3P/, https://matrix.org/blog/2018/09/06/critical-security-update-synapse-0-33-3-1/.