Provide references for CVE-2021-43863.
Where can I find more information about CVE-2021-43863?
References are available at: https://github.com/nextcloud/android/security/advisories/GHSA-vjp2-f63v-w479, https://github.com/nextcloud/android/commit/627caba60e69e223b0fc89c4cb18eaa76a95db95, https://hackerone.com/reports/1358597.