CVE-2025-645286.3MediumCWE-202

CVE-2025-64528: Users are able to find users by name even when `enable_names` is off

discourse

Affected: discourse · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.3%probability of exploitation in the next 30 days

21st percentile

050100

Higher than 21% of scored CVEs

6.3MediumCVSS 4.0

LowMediumHighCrit.

DescriptionCVE.org

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 products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

discourse · discourse< 3.5.3; >= 2025.11.0-latest, < 2025.11.1; >= 2025.12.0-latest, < 2025.12.0

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Exposure of Sensitive Information Through Data Queries · Information Disclosure
Vendor: discourse
Published: December 2025
Band: Unlikely (under 1%), December 2025

CoverageNo articles yet

No CyberSIXT article names CVE-2025-64528 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.