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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

No data.

No data.

No data.

No data.

References
Link Providers
https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81 cve-icon cve-icon
https://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09df cve-icon cve-icon
https://github.com/discourse/discourse/commit/e936a523b5900a9d866d23ea3da904ba12bb0fb2 cve-icon cve-icon
https://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4 cve-icon cve-icon
History

Tue, 30 Dec 2025 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 30 Dec 2025 16:15:00 +0000

Type Values Removed Values Added
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.
Title Users are able to find users by name even when `enable_names` is off
Weaknesses CWE-202
References
Metrics cvssV4_0

{'score': 6.3, '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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-12-30T18:11:53.787Z

Reserved: 2025-11-05T21:15:39.401Z

Link: CVE-2025-64528

cve-icon Vulnrichment

Updated: 2025-12-30T18:10:31.792Z

cve-icon NVD

Status : Received

Published: 2025-12-30T16:15:45.930

Modified: 2025-12-30T16:15:45.930

Link: CVE-2025-64528

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.