What is the CVSS score of CVE-2021-47776?

CVE-2021-47776 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Umbraco Cms are affected by CVE-2021-47776?

Organizations using Umbraco CMS v8.14.1 should be aware of moderate risk from CVE-2021-47776, a server-side request forgery vulnerability rated CVSS 5.3.

Is there a public PoC exploit available for CVE-2021-47776?

Yes, a public proof-of-concept exploit is available for CVE-2021-47776. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2021-47776?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Umbraco Cms CVE-2021-47776

MEDIUM

Server-Side Request Forgery (SSRF) (CWE-918)

2026-01-15 disclosure@vulncheck.com

GHSA-h66j-xm43-47pp

SSRF Umbraco Cms

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 23, 2026 - 18:06 vuln.today

Public exploit code

CVE Published

Jan 15, 2026 - 16:16 nvd

MEDIUM 5.3

DescriptionCVE.org

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.

AnalysisAI

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. [CVSS 5.3 MEDIUM]

Technical ContextAI

Classified as CWE-918 (Server-Side Request Forgery (SSRF)). Affects Umbraco Cms. 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.

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

CVE-2021-47776 vulnerability details – vuln.today

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Umbraco Cms CVE-2021-47776

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code