Description
Discourse is an open source discussion platform. Prior to versions 3.5.3, 2025.11.1, and 2025.12.0, an attacker who knows part of a username can find the user and their full name via UI or API, even when `enable_names` is disabled. Versions 3.5.3, 2025.11.1, and 2025.12.0 contain a fix.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| discourse | discourse | < 3.5.3, >= 2025.11.0-latest, < 2025.11.1, >= 2025.12.0-latest, < 2025.12.0 | — |
References
- https://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4
- https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81
- https://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09df
- https://github.com/discourse/discourse/commit/e936a523b5900a9d866d23ea3da904ba12bb0fb2