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VULNERABILITIES

CVE-2026-33425 Details

Description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, unauthenticated users can determine whether a specific user is a member of a private group by observing changes in directory results when using the `exclude_groups` parameter. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, disable public access to the user directory via Admin → Settings → hide user profiles from public.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://github.com/discourse/discourse/security/advisories/GHSA-r6rh-xvf5-r5f2 [email protected]MitigationVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-203Observable Discrepancy[email protected]
CWE-639Authorization Bypass Through User-Controlled Key[email protected]
CWE-862Missing Authorization[email protected]

Affected Products

ProductVersions
discourse discourse
>= 2026.1.0, < 2026.1.2
>= 2026.2.0, < 2026.2.1
2026.3.0

CPE

  • cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*
  • cpe:2.3:a:discourse:discourse:2026.3.0:*:*:*:latest:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-33425
NVD Published Date:
Mar 21, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-33425 Details - Not Deferred