CVE-2021-32652
Nextcloud Mail is a mail app for the Nextcloud platform. A missing permission check in Nextcloud Mail before 1.4.3 and 1.8.2 allows another authenticated users to access mail metadata of other users. Versions 1.4.3 and 1.8.2 contain patches for this vulnerability; no workarounds other than the patches are known to exist.
Date published : 2021-06-01
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-mxx2-6rg9-v2vc