Vulnerability Description
Discourse is an open-source community discussion platform. In versions 3.5.0 and below, the Discourse AI suggestion endpoints for topic “Title”, “Category”, and “Tags” allowed authenticated users to extract information about topics that they weren’t authorized to access. By modifying the “topic_id” value in API requests to the AI suggestion endpoints, users could target specific restricted topics. The AI model’s responses then disclosed information that the authenticated user couldn’t normally access. This issue is fixed in version 3.5.1. To workaround this issue, users can restrict group access to the AI helper feature through the "composer_ai_helper_allowed_groups" and "post_ai_helper_allowed_groups" site settings.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Discourse | Discourse | < 3.5.1 |
Related Weaknesses (CWE)
References
- https://github.com/discourse/discourse/commit/28d569cae9b33cd55d647bf41806106e33Patch
- https://github.com/discourse/discourse/security/advisories/GHSA-32v2-x274-vfhrVendor Advisory
- https://www.vicarius.io/vsociety/posts/cve-2025-58055-detect-discourse-vulnerabi
- https://www.vicarius.io/vsociety/posts/cve-2025-58055-mitigate-discourse-vulnera
FAQ
What is CVE-2025-58055?
CVE-2025-58055 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Discourse is an open-source community discussion platform. In versions 3.5.0 and below, the Discourse AI suggestion endpoints for topic “Title”, “Category”, and “Tags” allowed authenticated users to e...
How severe is CVE-2025-58055?
CVE-2025-58055 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-58055?
Check the references section above for vendor advisories and patch information. Affected products include: Discourse Discourse.