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CVE-2023-43657

7.2 · HIGH

discourse-encrypt is a plugin that provides a secure communication channel through Discourse.

Published Sep 28, 2023CWE-79EPSS 0.59%

Overview

CVE-2023-43657 is a high-severity vulnerability. It was published on September 28, 2023 and has a CVSS 3.1 base score of 7.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

discourse-encrypt is a plugin that provides a secure communication channel through Discourse. Improper escaping of encrypted topic titles could lead to a cross site scripting (XSS) issue when a site has content security policy (CSP) headers disabled. Having CSP disabled is a non-default configuration, and having it disabled with discourse-encrypt installed will result in a warning in the Discourse admin dashboard. This has been fixed in commit `9c75810af9` which is included in the latest version of the discourse-encrypt plugin. Users are advised to upgrade. Users unable to upgrade should ensure that CSP headers are enabled and properly configured.

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

Refdeveloper.mozilla.org/en-US/docs/Web/HTTP/CSPGitHubgithub.com/discourse/discourse-encrypt/commit/9c75810af9a474d7edaec67dea66f852c0ba1f4eGitHubgithub.com/discourse/discourse-encrypt/security/advisories/GHSA-5fh6-wp7p-xx7vRefdeveloper.mozilla.org/en-US/docs/Web/HTTP/CSPGitHubgithub.com/discourse/discourse-encrypt/commit/9c75810af9a474d7edaec67dea66f852c0ba1f4eGitHubgithub.com/discourse/discourse-encrypt/security/advisories/GHSA-5fh6-wp7p-xx7v

How CyberStrike helps

Frequently asked questions

What is CVE-2023-43657?

CVE-2023-43657 is a high-severity vulnerability. It was published on September 28, 2023 and has a CVSS 3.1 base score of 7.2 (HIGH).

How severe is CVE-2023-43657?

This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-43657?

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-2023-43657?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-43657 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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