CVE-2026-53907 — Stored Cross‑Site Scripting in MCO

CVE-2026-53907

Stored Cross‑Site Scripting in MCO PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
MyComplianceOffice / MCO	affected 25.3.3.1

CWE

CWE-79

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.