Vulnerability Description
Discourse is an open source platform for community discussion. Due to the improper sanitization of SVG files, an attacker can execute arbitrary JavaScript on the users’ browsers by uploading a crafted SVG file. This issue is patched in the latest stable and tests-passed versions of Discourse. Users are advised to upgrade. For users unable to upgrade there are two possible workarounds: enable CDN handing of uploads (and ensure the CDN sanitizes SVG files) or disable SVG file uploads by ensuring that the `authorized extensions` site setting does not include `svg` (or reset that setting to the default, by default Discourse doesn't enable SVG uploads by users).
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Discourse | Discourse | <= 3.0.2 |
Related Weaknesses (CWE)
References
- https://github.com/discourse/discourse/security/advisories/GHSA-w5mv-4pjf-xj43MitigationThird Party Advisory
- https://github.com/discourse/discourse/security/advisories/GHSA-w5mv-4pjf-xj43MitigationThird Party Advisory
FAQ
What is CVE-2023-30538?
CVE-2023-30538 is a vulnerability with a CVSS score of 5.4 (MEDIUM). Discourse is an open source platform for community discussion. Due to the improper sanitization of SVG files, an attacker can execute arbitrary JavaScript on the users’ browsers by uploading a crafted...
How severe is CVE-2023-30538?
CVE-2023-30538 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-30538?
Check the references section above for vendor advisories and patch information. Affected products include: Discourse Discourse.