High severity · published Mar 16, 2020
CVE-2020-9471
Umbraco Cloud 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Packages functionality
8.8
CVSS
2.3%
EPSS
No
On KEV
Description
Umbraco Cloud 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Packages functionality.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.3% · higher than 83% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UC
Umbraco Cms · Umbraco
8.5.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-9471
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-9471
Exploit
https://gitlab.com/eLeN3Re/cve-2020-9471
More from Umbraco Cms
10.0
CVE-2025-67288
An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code by uploading a crafted PDF file
9.8
CVE-2012-10054
Umbraco CMS versions prior to 4.7.1 are vulnerable to unauthenticated remote code execution via the codeEditorSave.asmx SOAP endpoint, which exposes a SaveDLRScript operation that…
9.8
CVE-2023-37267
Umbraco is a ASP.NET CMS
9.8
CVE-2014-10074
Umbraco before 7.2.0 has a remote PHP code execution vulnerability because Umbraco.Web.UI/config/umbracoSettings.Release.config does not block the upload of .php files
9.8
CVE-2012-1301
The FeedProxy.aspx script in Umbraco 4.7.0 allows remote attackers to proxy requests on their behalf via the "url" parameter