CVE-2025-64528

EUVD-2025-205817
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 18%
Affected Products (NVD)
VendorProductVersion
discoursediscourse
𝑥
< 3.5.3
discoursediscourse
2025.11.0
discoursediscourse
2025.12.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81
https://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09df
https://github.com/discourse/discourse/commit/e936a523b5900a9d866d23ea3da904ba12bb0fb2
https://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4