CVE-2025-64528

MEDIUM6.3

Users are able to find users by name even when `enable_names` is off

Published Dec 30, 2025

Modified 2 months ago

Details

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.

References

WEB

https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81

WEB

https://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09df

WEB

https://github.com/discourse/discourse/commit/e936a523b5900a9d866d23ea3da904ba12bb0fb2

WEB

https://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2025-64528

CVSS Analysis