CVE-2025-64528 Users are able to find users by name even when `enable_names` is off
Attackers can discover user full names via UI or API despite the enable_names setting being disabled, exposing private user data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-64528?
CVE-2025-64528 is a medium-severity vulnerability in Discourse Discourse, published on 30 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-202
Which versions are affected by CVE-2025-64528?
1 open source package ship an affected version, including discourse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
discourse Bitnami | All versions | 3.5.3, 2025.11.1 |
Products include Discourse Discourse.
How do I fix CVE-2025-64528?
Upgrade discourse to a fixed version for your release line: 3.5.3 or 2025.11.1.
Is CVE-2025-64528 being exploited?
There is no known exploitation of CVE-2025-64528 in the wild and no public exploit code.
Other vulnerabilities in Discourse Discourse
- CVE-2021-41163 RCE via malicious SNS subscription payload
- CVE-2022-36066 Discourse vulnerable to RCE via admins uploading maliciously zipped file
- CVE-2022-39356 Discourse user account takeover via email and invite link
- CVE-2023-22468 Discourse vulnerable to Cross-site Scripting in local oneboxes
- CVE-2026-27934 Discourse leaks private topic title and post excerpt via user action API endpoint
Sources
Also known as BIT-discourse-2025-64528, GHSA-c59w-jwx7-34v4.