CVE-2026-53907

UNKNOWN 0.0

Stored Cross‑Site Scripting in MCO

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	mycomplianceoffice
Product	mco
Published	Jul 1, 2026
Last Updated	Jul 1, 2026

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Affected Versions

MyComplianceOffice / MCO

25.3.3.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Hubert Decyusz (AFINE Team)