Vulnerability · Published Dec 30, 2025 · Assigned by GitHub_M
CVE-2025-64528Users are able to find users by name even when `enable_names` is off
Medium 6.3
In plain English
A medium-severity security flaw in discourse from discourse. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Severity (CVSS 4.0)6.3Medium
Exploit odds (30 days)0.3%top 78.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
Weakness: CWE-202 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
References
- https://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4 x_refsource_CONFIRM
- https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81 x_refsource_MISC
- https://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09df x_refsource_MISC
- https://github.com/discourse/discourse/commit/e936a523b5900a9d866d23ea3da904ba12bb0fb2 x_refsource_MISC