CVE-2021-47776

5.3 MEDIUM
Published: January 15, 2026 Modified: January 23, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
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

Patch Vendor Advisory Exploit Third Party Advisory
https://our.umbraco.com/
Source: disclosure@vulncheck.com
Product
https://releases.umbraco.com/all-releases
Source: disclosure@vulncheck.com
Release Notes
https://www.exploit-db.com/exploits/50462
Source: disclosure@vulncheck.com
Exploit VDB Entry

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.0%
3th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

umbraco