CVE-2026-53907
Stored Cross‑Site Scripting in MCO
Vexday Risk Score
10Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 4.8EPSS —KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
01 Jul 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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 · MCOWant to know if your infrastructure is exposed to this?
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