CVE-2020-9471

Name: CVE-2020-9471
Creator: NVD / NIST
Published: 2020-03-16T20:15:12.923+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.28%

Last modified Jun 17, 2026

CVE-2020-9471 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Umbraco Cloud 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Packages functionality.. EPSS estimates a 2.28% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

2.28%

80.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Umbraco	Umbraco Cms	8.5.3

References

https://gitlab.com/eLeN3Re/cve-2020-9471Exploit, Third Party Advisory
https://gitlab.com/eLeN3Re/cve-2020-9471Exploit, Third Party Advisory

Timeline

Published: Mar 16, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9471?

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

How severe is CVE-2020-9471?

CVE-2020-9471 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.28% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9471?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-9471?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST