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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-h66j-xm43-47pp Umbraco CMS contains a server-side request forgery vulnerability
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 16 Jan 2026 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Umbraco
Umbraco umbraco
Vendors & Products Umbraco
Umbraco umbraco

Thu, 15 Jan 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 15 Jan 2026 16:00:00 +0000

Type Values Removed Values Added
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.
Title Umbraco v8.14.1 - 'baseUrl' SSRF
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-01-15T16:40:33.352Z

Reserved: 2026-01-14T14:39:44.736Z

Link: CVE-2021-47776

cve-icon Vulnrichment

Updated: 2026-01-15T16:40:30.568Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-15T16:16:09.510

Modified: 2026-01-16T15:55:33.063

Link: CVE-2021-47776

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-16T13:43:37Z

Weaknesses