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Vulnerability Intelligence

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 weeks ago

No fix available

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

WEBhttps://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81 WEBhttps://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09df WEBhttps://github.com/discourse/discourse/commit/e936a523b5900a9d866d23ea3da904ba12bb0fb2 WEBhttps://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4 ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2025-64528

CVSS Analysis

CVSS v4.0

6.3

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Attack Requirements

PresentAT:P

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Vulnerable System

Vuln. Confidentiality

LowVC:L

Vuln. Integrity

NoneVI:N

Vuln. Availability

NoneVA:N

Subsequent System

Subseq. Confidentiality

LowSC:L

Subseq. Integrity

NoneSI:N

Subseq. Availability

NoneSA:N

6.3/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

Weakness Type (CWE)

Other

Ecosystems

Timeline

PublishedDec 30, 2025

ModifiedDec 30, 2025

CVE-2025-64528 | Mondoo Vulnerability Intelligence