CVE-2026-53907 — MEDIUM (5.4)

Vulnerability Description

MCO is vulnerable to Stored Cross‑Site Scripting (XSS) via the application logo upload functionality. An attacker with the ability to change the application logo can upload a crafted SVG file containing malicious JavaScript code that is executed when the logo is rendered or opened. 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

5.4

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Mycomplianceoffice	Mycomplianceoffice	25.3.3.1

Related Weaknesses (CWE)

CWE-79

References

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

FAQ

What is CVE-2026-53907?

CVE-2026-53907 is a vulnerability with a CVSS score of 5.4 (MEDIUM). MCO is vulnerable to Stored Cross‑Site Scripting (XSS) via the application logo upload functionality. An attacker with the ability to change the application logo can upload a crafted SVG file containi...

How severe is CVE-2026-53907?

CVE-2026-53907 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-53907?

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