Unrated severityNVD Advisory· Published Jul 1, 2026· Updated Jul 1, 2026
Stored Cross‑Site Scripting in MCO
CVE-2026-53907
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.
Affected products
1Patches
Vulnerability mechanics
References
2- cert.pl/en/posts/2026/07/CVE-2026-53902mitrethird-party-advisory
- mco.mycomplianceoffice.commitreproduct
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