CVE-2025-66515

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.

CVSS v3.1 Score

2.7

LOW

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-287 Improper Authentication

Affected Products

Vendor	Product	Versions
nextcloud	approval	1.0.0 — 1.3.1
nextcloud	approval	2.0.0 — 2.5.0

References

Advisories & Patches

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

Other References

https://github.com/nextcloud/approval/pull/334

Frequently Asked Questions

What is CVE-2025-66515? +

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. It has a CVSS v3.1 base score of 2.7 (LOW).

How severe is CVE-2025-66515? +

CVE-2025-66515 has a CVSS v3.1 score of 2.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2025-66515? +

CVE-2025-66515 affects products from nextcloud, specifically: approval. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-66515? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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