CVE-2025-64528
December 30, 2025
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 Packages
https://github.com/discourse/discourse.git (GITHUB):
Affected version(s) =v2025.11.0 <v2025.11.1Fix Suggestion:
Update to version v2025.11.1https://github.com/discourse/discourse.git (GITHUB):
Affected version(s) >=v1.0.0 <v3.5.3Fix Suggestion:
Update to version v3.5.3Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Exposure of Sensitive Information Through Data Queries
EPSS
Base Score:
0.04
