CVE-2026-53908

MCO is vulnerable to User Enumeration through authentication-related functionalities. The application returns distinguishable responses for valid and invalid users during username reminder and password reset operations. An attacker can leverage these differences to enumerate valid usernames and email addresses. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://cert.pl/en/posts/2026/07/CVE-2026-53902	Third Party Advisory
https://mco.mycomplianceoffice.com/	Product

Configurations

Configuration 1 (hide)

cpe:2.3:a:mycomplianceoffice:mycomplianceoffice:25.3.3.1:*:*:*:*:*:*:*

History

25 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) MCO es vulnerable a la Enumeración de Usuarios a través de funcionalidades relacionadas con la autenticación. La aplicación devuelve respuestas distinguibles para usuarios válidos e inválidos durante las operaciones de recordatorio de nombre de usuario y restablecimiento de contraseña. Un atacante puede aprovechar estas diferencias para enumerar nombres de usuario y direcciones de correo electrónico válidos. Debido a que los intentos de contacto con el proveedor no tuvieron éxito, la vulnerabilidad solo se ha confirmado en la versión 25.3.3.1, pero también puede afectar a otras versiones.

Information

Published : 2026-07-01 13:17

Updated : 2026-10-25 17:10

NVD link : CVE-2026-53908

Mitre link : CVE-2026-53908

CVE.ORG link : CVE-2026-53908

JSON object : View

Products Affected

mycomplianceoffice

mycomplianceoffice

CWE

CWE-204

Observable Response Discrepancy

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