CVE-2025-64528
MEDIUM severity · CVSS 5.3 · CWE-202
5.3CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactLow
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81 ↗
Additional information
- NVD record
- https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81Patch
- https://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09dfPatch
- https://github.com/discourse/discourse/commit/e936a523b5900a9d866d23ea3da904ba12bb0fb2Patch
- https://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4Advisory