CVE-2020-9472· NVD / CVE Program· CNA mitre

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

MediumCVSS 6.5 · v3.1—No exploit Fix available

GHSA-j66f-h9hm-975m

Published: Mar 16, 2020
Updated: Jun 16, 2026
EPSS: 2.1% · 81th percentile
CWE: CWE-434

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Action score

Monitor

Low priority for now.

CVSS: 26 / 40 · 6.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 2.1%

Noroxi analysis

No Noroxi analysis for this record yet

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Affected systems

Vendor	Product	CPE
umbraco	umbraco cms	cpe:2.3:a:umbraco:umbraco_cms

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

umbraco umbraco cms8.5.3

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
NuGet	UmbracoCms	before 8.5.4	8.5.4

Same product

umbraco: all records

Other highest-scoring records for the same primary product.

CVE-2025-67288An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code by uploading a crafted PDF file.
40Plan
CVE-2020-5810A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current.
40Plan
CVE-2014-10074Umbraco before 7.2.0 has a remote PHP code execution vulnerability because Umbraco.Web.UI/config/umbracoSettings.Release.config does not blo
40Plan
CVE-2012-1301The FeedProxy.aspx script in Umbraco 4.7.0 allows remote attackers to proxy requests on their behalf via the "url" parameter.
40Plan
CVE-2023-37267Umbraco allows possible Admin-level access to backoffice without Auth under rare conditions
39Monitor
CVE-2012-10054Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE
38Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
NuGet:UmbracoCms	8.5.4	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).