CVE-2023-25821: Nextcloud Server

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

Nextcloud is an Open Source private cloud software. Versions 24.0.4 and above, prior to 24.0.7, and 25.0.0 and above, prior to 25.0.1, contain Improper Access Control. Secure view for internal shares can be circumvented if reshare permissions are also given. This issue is patched in versions 24.0.7 and 25.0.1. No workaround is available.

Affected products

• Nextcloud Nextcloud Server: from 24.0.4, before 24.0.7 (fixed in 24.0.7); version 25.0.0 only

Published 2023-02-25. Last modified 2026-06-17.