CVE-2026-33425
Discourse has inferable private group membership or existence via exclude_groups parameter
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-203 CWE-639 CWE-862 |
| Vendor | discourse |
| Product | discourse |
| Published | Mar 20, 2026 |
| Last Updated | Mar 23, 2026 |
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Affected Versions
discourse / discourse
>= 2026.1.0-latest, < 2026.1.2 >= 2026.2.0-latest, < 2026.2.1 = 2026.3.0-latest