CVE-2024-35234: Discourse vulnerable to stored-dom XSS via Facebook Oneboxes
First published: Wed Jul 03 2024(Updated: )
Discourse is an open-source discussion platform. Prior to version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch, an attacker can execute arbitrary JavaScript on users’ browsers by posting a specific URL containing maliciously crafted meta tags. This issue only affects sites with Content Security Polic (CSP) disabled. The problem has been patched in version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch. As a workaround, ensure CSP is enabled on the forum.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Discourse | <3.2.3 | |
| Discourse | <3.3.0 | |
| Discourse | =3.3.0-beta1 | |
| Discourse | =3.3.0-beta2 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-35234?
CVE-2024-35234 has been classified with a critical severity due to the potential for arbitrary JavaScript execution in users' browsers.
How do I fix CVE-2024-35234?
To fix CVE-2024-35234, upgrade your Discourse installation to version 3.2.3 or later on the stable branch or version 3.3.0.beta3 or later on the tests-passed branch.
Which versions of Discourse are affected by CVE-2024-35234?
CVE-2024-35234 affects Discourse versions prior to 3.2.3 on the stable branch and versions prior to 3.3.0.beta3 on the tests-passed branch.
What types of attacks does CVE-2024-35234 expose users to?
CVE-2024-35234 exposes users to potential cross-site scripting (XSS) attacks through maliciously crafted URLs with meta tags.
Is there a workaround for CVE-2024-35234 if I can't upgrade immediately?
There are no documented workarounds for CVE-2024-35234, so upgrading is the recommended mitigation strategy.
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- version/discourse/3.3.0-beta2