CVE-2023-28997: Nextcloud Desktop

Medium severity, CVSS 6.5. EPSS: 1.1% chance of exploitation in the next 30 days.

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.6.5, a malicious server administrator can recover and modify the contents of end-to-end encrypted files. Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.

Affected products

• Nextcloud Desktop: from 3.0.0, before 3.6.5 (fixed in 3.6.5)

Published 2023-04-04. Last modified 2026-06-17.