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CVE-2025-58351

6.8 · MEDIUM

Outline is a service that allows for collaborative documentation.

Published Sep 3, 2025CWE-79EPSS 0.39%

Overview

CVE-2025-58351 is a medium-severity vulnerability. It was published on September 3, 2025 and has a CVSS 3.1 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Outline is a service that allows for collaborative documentation. In versions 0.72.0 through 0.83.0, Outline introduced a feature which facilitates local file system storage capabilities as an optional file storage strategy. This feature allowed a CSP bypass as well as a ContentType bypass that might facilitate further attacks. In the case of self-hosting and using Outline FILE_STORAGE=local on the same domain as the Outline application, a malicious payload can be uploaded as a file attachment and bypass those CSP restrictions, allowing script execution within the context of another user. This is fixed in version 0.84.0.

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/outline/outline/commit/18bc93c9c207329244c6909606a2393e863892a3GitHubgithub.com/outline/outline/releases/tag/v0.84.0GitHubgithub.com/outline/outline/security/advisories/GHSA-gcj7-c9jv-fhgf

How CyberStrike helps

Frequently asked questions

What is CVE-2025-58351?

CVE-2025-58351 is a medium-severity vulnerability. It was published on September 3, 2025 and has a CVSS 3.1 base score of 6.8 (MEDIUM).

How severe is CVE-2025-58351?

This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-58351?

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-2025-58351?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-58351 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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