What’s Vulnerable › Vulnerabilities

CVE-2025-66515: Nextcloud Approval app allows users to request approval for other users file

• Severity: low (CVSS 2.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-05 · updated 2026-10-15
• Weakness: CWE-287

Description

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; from 2.0.0 before 2.5.0 — fixed in 1.3.1, 2.5.0

How to fix

Upgrade to a fixed version: Nextcloud Approval 1.3.1, 2.5.0. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/approval/commit/e30b56b7832255311ac800b7875f44866e88fff4
• https://github.com/nextcloud/approval/pull/334
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-q26g-fmjq-x5g5
• https://hackerone.com/reports/3338748

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