CVE-2026-53907mediumCWE-79

CVE-2026-53907: medium-severity vulnerability in MyComplianceOffice MCO

Stored Cross‑Site Scripting in MCO

Published

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.8epss 0.2%
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:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
Affected products
MyComplianceOffice · MCO
Related CVEs — MyComplianceOffice MCO

In the same product, most dangerous first.

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