CVE-2025-64528 - CVE House
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Status published Medium CVE-2025-64528

Users are able to find users by name even when `enable_names` is off

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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CVE-2025-68934
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CVE-2025-68933
Discourse non-admin moderators can exfiltrate private content via post ownership transfer
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Discourse users archives leaked to users with moderation privileges
Medium 5.9

Affected Vendor

Affected Software

discourse
Vulnerable Versions:
< 3.5.3, >= 2025.11.0-latest, < 2025.11.1, >= 2025.12.0-latest, < 2025.12.0

Timeline

Official Publish: December 30th, 2025
Last Modified: December 30th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-202

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.