Observable Response Discrepancy in Mautic - CVE-2025-9824
Published: May 25, 2026
Vulnerability identifier: #VU132237
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-9824
CWE-ID: CWE-204
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mautic
Affected software:
Mautic
Mautic
Detailed vulnerability description
The vulnerability allows a remote attacker to enumerate valid usernames.
The vulnerability exists due to observable response discrepancy in the form login authenticator when handling login requests. A remote attacker can measure login response times to enumerate valid usernames.
This timing difference occurs because password hashing is performed for existing usernames but not for non-existent usernames.
How to mitigate CVE-2025-9824
Install security update from vendor's website.