CVE-2025-66515: Nextcloud Approval

Low severity, CVSS 2.7. EPSS: 0.3% chance of exploitation in the next 30 days.

The Nextcloud Approval app allows approval or disapproval of files in the sidebar. Prior to 1.3.1 and 2.5.0, an authenticated user listed as a requester in a workflow can set another user’s file into the “pending approval” without access to the file by using the numeric file id. This vulnerability is fixed in 1.3.1 and 2.5.0.

Affected products

• Nextcloud Approval: from 1.0.0, before 1.3.1 (fixed in 1.3.1); from 2.0.0, before 2.5.0 (fixed in 2.5.0)

Published 2025-12-05. Last modified 2026-06-17.