CVE-2025-47791: Nextcloud Server

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server prior to 28.0.13, 29.0.10, and 30.0.3 and Nextcloud Enterprise Server prior to 28.0.13, 29.0.10, and 30.0.3, a currently unused endpoint to verify a share recipient was not protected correctly, allowing to proxy requests to another server. The endpoint was removed in Nextcloud Server 28.0.13, 29.0.10, and 30.0.3 and Nextcloud Enterprise Server 28.0.13, 29.0.10, and 30.0.3. No known workarounds are available.

Affected products

• Nextcloud Nextcloud Server: from 28.0.0, before 28.0.13 (fixed in 28.0.13); from 29.0.0, before 29.0.10 (fixed in 29.0.10); from 30.0.0, before 30.0.3 (fixed in 30.0.3)

Published 2025-05-16. Last modified 2026-06-17.