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Vulnerability record · CVE-2020-9471 · published 16 March 2020

CVE-2020-9471: Umbraco cms unrestricted file upload vulnerability

Umbraco · Umbraco Cms

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

8.8 CVSS 3.1 High EPSS 2.3% · top 17.5% CWE-434 · Unrestricted file upload
8.8CVSS 3.1 base score, v2 6.5
2.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gitlab.com/eLeN3Re/cve-2020-9471 ExploitThird Party Advisory
https://gitlab.com/eLeN3Re/cve-2020-9471 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-9471), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.