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VULNERABILITIES

CVE-2021-47776 Details

Description

Umbraco CMS v8.14.1 contains a server-side request forgery vulnerability that allows attackers to manipulate baseUrl parameters in multiple dashboard and help controller endpoints. Attackers can craft malicious requests to the GetContextHelpForPage, GetRemoteDashboardContent, and GetRemoteDashboardCss endpoints to trigger unauthorized server-side requests to external hosts.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://our.umbraco.com/ [email protected]Product
https://releases.umbraco.com/all-releases [email protected]Release Notes
https://www.exploit-db.com/exploits/50462 [email protected]ExploitVDB Entry

Weakness Enumeration

CWE-IDCWE NameSource
CWE-918Server-Side Request Forgery (SSRF)[email protected]

Affected Products

ProductVersions
umbraco umbraco cms
8.14.1

CPE

  • cpe:2.3:a:umbraco:umbraco_cms:8.14.1:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-47776
NVD Published Date:
Jan 15, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-47776 Details - Not Deferred