CVE-2026-53908 — MEDIUM (4.3)

Vulnerability 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.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Mycomplianceoffice	Mycomplianceoffice	25.3.3.1

Related Weaknesses (CWE)

CWE-204

References

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

FAQ

What is CVE-2026-53908?

CVE-2026-53908 is a vulnerability with a CVSS score of 4.3 (MEDIUM). MCO is vulnerable to User Enumeration through authentication-related functionalities. The application returns distinguishable responses for valid and invalid users during username reminder and passwor...

How severe is CVE-2026-53908?

CVE-2026-53908 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-53908?

Check the references section above for vendor advisories and patch information. Affected products include: Mycomplianceoffice Mycomplianceoffice.