CVE-2025-64528
Users are able to find users by name even when `enable_names` is off
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.
INFO
Published Date :
Dec. 30, 2025, 4:15 p.m.
Last Modified :
Feb. 20, 2026, 5:04 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Discourse to version 3.5.3 or later.
- Update Discourse to version 2025.11.1 or later.
- Update Discourse to version 2025.12.0 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-64528.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-64528 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-64528
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-64528 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-64528 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Added CWE NVD-CWE-Other Added CPE Configuration OR *cpe:2.3:a:discourse:discourse:2025.12.0:*:*:*:stable:*:*:* *cpe:2.3:a:discourse:discourse:2025.11.0:*:*:*:stable:*:*:* *cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:* versions up to (excluding) 3.5.3 Added Reference Type GitHub, Inc.: https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09df Types: Patch Added Reference Type GitHub, Inc.: https://github.com/discourse/discourse/commit/e936a523b5900a9d866d23ea3da904ba12bb0fb2 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4 Types: Third Party Advisory -
New CVE Received by [email protected]
Dec. 30, 2025
Action Type Old Value New Value 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-202 Added Reference https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81 Added Reference https://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09df Added Reference https://github.com/discourse/discourse/commit/e936a523b5900a9d866d23ea3da904ba12bb0fb2 Added Reference https://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4