CVE-2021-47776 MEDIUM

CVE-2021-47776: Umbraco v8.14.1 - 'baseUrl' SSRF

Vendor Umbraco
Product Umbraco
Weakness CWE-918 · SSRF
Published January 15, 2026
Last update April 7, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 15, 2026 CVE published
April 7, 2026 Record updated