CVE-2021-47776

MEDIUM 5.3

Umbraco v8.14.1 - 'baseUrl' SSRF

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-918
Vendor	umbraco
Product	umbraco
Published	Jan 15, 2026
Last Updated	Apr 7, 2026

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CVSS v3 Breakdown

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

Affected Versions

umbraco / Umbraco

8.14.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/50462 our.umbraco.com: https://our.umbraco.com/ releases.umbraco.com: https://releases.umbraco.com/all-releases

Credits

NgoAnhDuc