Unrestricted Upload of File with Dangerous Type in Umbraco CMS

MEDIUM 6.5CVE-2020-9472 · GHSA-j66f-h9hm-975m · Published 16/03/2020 · updated 17/06/2026

In short

CVE-2020-9472 is a MEDIUM (CVSS 6.5) vulnerability affecting UmbracoCms, umbraco cms (umbraco).
Chance of exploitation in the next 30 days (EPSS): 2.1%, higher than 81.8% of all vulnerabilities.
Fix: update to 8.5.4 or later.

Package	Affected versions	Patched versions
UmbracoCms NuGet	`< 8.5.4`	`8.5.4`
umbraco cms umbraco	`= 8.5.3`	No fix yet

Umbraco CMS 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Package functionality.

NVD description

Umbraco CMS 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Package functionality.

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Package

Affected versions

Patched versions

NuGet

< 8.5.4

8.5.4

= 8.5.3

No fix yet

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