CVE-2024-47772: Cross-site Scripting (XSS) via chat excerpts when content security policy (CSP) disabled in Discourse
First published: Mon Oct 07 2024(Updated: )
Discourse is an open source platform for community discussion. An attacker can execute arbitrary JavaScript on users' browsers by sending a maliciously crafted chat message and replying to it. This issue only affects sites with CSP disabled. This problem is patched in the latest version of Discourse. All users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum. Users who do upgrade should also consider enabling a CSP as well as a proactive measure.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Discourse | <3.3.2 | |
| Discourse | <3.4.0 | |
| Discourse | =3.4.0 | |
| Discourse | =3.4.0-beta1 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-47772?
CVE-2024-47772 is classified as a medium severity vulnerability affecting the Discourse platform.
How do I fix CVE-2024-47772?
To mitigate CVE-2024-47772, enable Content Security Policy (CSP) on your Discourse site.
What versions of Discourse are affected by CVE-2024-47772?
CVE-2024-47772 affects Discourse versions prior to 3.3.2 for stable and 3.4.0 for beta.
Can CVE-2024-47772 be exploited on all Discourse installations?
No, CVE-2024-47772 can only be exploited on Discourse sites that have CSP disabled.
What kind of attack is possible with CVE-2024-47772?
An attacker can execute arbitrary JavaScript in users' browsers through malicious chat messages.
- agent/weakness
- agent/references
- agent/title
- agent/type
- agent/first-publish-date
- agent/description
- agent/author
- agent/event
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/severity
- agent/softwarecombine
- agent/source
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/discourse
- canonical/discourse
- version/discourse/3.4.0
- version/discourse/3.4.0-beta1