CVE-2026-53908 - Vulnerability Details - OpenCVE

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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

No data.

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References

Link	Providers
https://cert.pl/en/posts/2026/07/CVE-2026-53902
https://mco.mycomplianceoffice.com/

History

Wed, 01 Jul 2026 14:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 01 Jul 2026 12:45:00 +0000

Type	Values Removed	Values Added
Description		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.
Title		User Enumeration in MCO
Weaknesses		CWE-204
References		https://cert.pl/en/posts/2026/07/CVE-2026-53902 https://mco.mycomplianceoffice.com/
Metrics		cvssV4_0 `{'score': 6.9, 'vector': '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'}`

MITRE

Status: PUBLISHED

Assigner: CERT-PL

Published: 2026-07-01T11:59:15.246Z

Updated: 2026-07-01T13:38:09.459Z

Reserved: 2026-06-11T07:44:52.179Z

Link: CVE-2026-53908

Vulnrichment

Updated: 2026-07-01T13:38:04.577Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

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