CVE-2026-33425
Medium · 5.3CVSS
5.3
EPSS
0.8%
Published
Mar 21, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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