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CVE-2021-43794

5.3 · MEDIUM

Discourse is an open source discussion platform.

Published Dec 1, 2021CWE-610EPSS 1.05%

Overview

CVE-2021-43794 is a medium-severity vulnerability. It was published on December 1, 2021 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Discourse is an open source discussion platform. In affected versions an attacker can poison the cache for anonymous (i.e. not logged in) users, such that the users are shown a JSON blob instead of the HTML page. This can lead to a partial denial-of-service. This issue is patched in the latest stable, beta and tests-passed versions of Discourse.

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/discourse/discourse/commit/2da0001965c6d8632d723c46ea5df9f22a1a23f1GitHubgithub.com/discourse/discourse/security/advisories/GHSA-249g-pc77-65hpGitHubgithub.com/discourse/discourse/commit/2da0001965c6d8632d723c46ea5df9f22a1a23f1GitHubgithub.com/discourse/discourse/security/advisories/GHSA-249g-pc77-65hp

How CyberStrike helps

Frequently asked questions

What is CVE-2021-43794?

CVE-2021-43794 is a medium-severity vulnerability. It was published on December 1, 2021 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2021-43794?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-43794?

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-2021-43794?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-43794 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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