Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.Referenceshttps://hackerone.com/reports/1129996https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jmgp-77jq-fjp3https://github.com/nextcloud/mail/pull/4864https://github.com/nextcloud/mail/releases/tag/v1.9.5
