SB2026070154 - Improper access control in Discourse
Published: July 1, 2026
Security Bulletin ID
SB2026070154
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2025-64528)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper access control in user search functionality when querying for users by name via the UI or API. A remote attacker can search using a partial user name to disclose sensitive information.
The issue occurs even when the enable_names setting is disabled.
Remediation
Install update from vendor's website.