CVE-2020-9472 — Vulnerability in UmbracoCms — CVE Details

MEDIUM

Unrestricted Upload of File with Dangerous Type in Umbraco CMS

Published August 2, 2021Updated September 10, 2026Source: osv

Summary

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

Advisory Timeline

First published August 2, 2021 (1897 days ago).
Last revised September 10, 2026 — 1864 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update UmbracoCms to 8.5.4 or later

dotnet add package UmbracoCms --version 8.5.4

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: nuget (1).

Package	Ecosystem	Affected	Fixed In
UmbracoCms	nuget	4.10.0, 4.10.0-beta, 4.10.0-rc, 4.10.1 (+235 more)	8.5.4

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-434
Unrestricted File UploadMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 6.5 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

References

Frequently Asked Questions

What is CVE-2020-9472?: Unrestricted Upload of File with Dangerous Type in Umbraco CMS This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 6.5/10).
How do I check if my project is affected by CVE-2020-9472?: CVE-2020-9472 affects UmbracoCms. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-9472 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

6.5

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-j66f-h9hm-975m

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