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CVE-2020-26286

7.5 · HIGH

HedgeDoc is a collaborative platform for writing and sharing markdown.

Published Dec 29, 2020CWE-434EPSS 1.44%

Overview

CVE-2020-26286 is a high-severity vulnerability. It was published on December 29, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

HedgeDoc is a collaborative platform for writing and sharing markdown. In HedgeDoc before version 1.7.1 an unauthenticated attacker can upload arbitrary files to the upload storage backend including HTML, JS and PHP files. The problem is patched in HedgeDoc 1.7.1. You should however verify that your uploaded file storage only contains files that are allowed, as uploaded files might still be served. As workaround it's possible to block the `/uploadimage` endpoint on your instance using your reverse proxy. And/or restrict MIME-types and file names served from your upload file storage.

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/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8GitHubgithub.com/hedgedoc/hedgedoc/releases/tag/1.7.1GitHubgithub.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxcGitHubgithub.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8GitHubgithub.com/hedgedoc/hedgedoc/releases/tag/1.7.1GitHubgithub.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxc

How CyberStrike helps

Frequently asked questions

What is CVE-2020-26286?

CVE-2020-26286 is a high-severity vulnerability. It was published on December 29, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2020-26286?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-26286?

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-2020-26286?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-26286 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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