CVE-2026-33425
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.
- Affected products
- Discourse
- Discourse
- < 2026.1.2, 2026.2.1, 2026.3.0
- Fix
- Available
- CVSS 4.0
- 6.9 MEDIUM
- CVSS 3.1
- 5.3 MEDIUM
- EPSS
- 0.2% (11th percentile)
- Weakness
- CWE-639, CWE-862, CWE-203
- NVD status
- Analyzed
- Published
- 2026-03-20
CVE-2026-33425 at NVD
No indexed exploits for CVE-2026-33425 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2026-33425 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.