Provide references for CVE-2021-22896.
Where can I find more information about CVE-2021-22896?
References are available at: https://hackerone.com/reports/1129996, https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jmgp-77jq-fjp3, https://github.com/nextcloud/mail/pull/4864, https://github.com/nextcloud/mail/releases/tag/v1.9.5.