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CVE-2025-66515

2.7 · LOW

The Nextcloud Approval app allows approval or disapproval of files in the sidebar.

Published Dec 5, 2025CWE-287EPSS 0.31%

Overview

CVE-2025-66515 is a low-severity vulnerability. It was published on December 5, 2025 and has a CVSS 3.1 base score of 2.7 (LOW).

This vulnerability has a CVSS 3.1 base score of 2.7, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/nextcloud/approval/commit/e30b56b7832255311ac800b7875f44866e88fff4GitHubgithub.com/nextcloud/approval/pull/334GitHubgithub.com/nextcloud/security-advisories/security/advisories/GHSA-q26g-fmjq-x5g5Refhackerone.com/reports/3338748

How CyberStrike helps

Frequently asked questions

What is CVE-2025-66515?

CVE-2025-66515 is a low-severity vulnerability. It was published on December 5, 2025 and has a CVSS 3.1 base score of 2.7 (LOW).

How severe is CVE-2025-66515?

This vulnerability has a CVSS 3.1 base score of 2.7, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-66515?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-66515?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-66515 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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