CVE-2025-58055

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.

How to fix CVE-2025-58055

To remediate CVE-2025-58055, upgrade the affected package to a fixed version below.

• —upgrade to 3.5.1 or later

Is CVE-2025-58055 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 3.5.1

CVSS scores

References (5)

• WEBgithub.com/discourse/discourse/commit/28d569cae9b33cd55d647bf41806106e33d975c9
• WEBgithub.com/discourse/discourse/security/advisories/GHSA-32v2-x274-vfhr
• WEBnvd.nist.gov/vuln/detail/CVE-2025-58055
• WEBwww.vicarius.io/vsociety/posts/cve-2025-58055-detect-discourse-vulnerability