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CVE-2021-47776

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Date: January 15, 2026

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.

Severity Score

Related Resources (7)

https://www.exploit-db.com/exploits/50462
https://github.com/umbraco/Umbraco-CMS
https://our.umbraco.com/
https://our.umbraco.com
https://nvd.nist.gov/vuln/detail/CVE-2021-47776
https://releases.umbraco.com/all-releases
https://www.mend.io/vulnerability-database/CVE-2021-47776

Severity Score

Weakness Type (CWE)

Server-Side Request Forgery (SSRF)

CWE-918

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

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