Moderate severityOSV Advisory· Published Jan 15, 2026· Updated Apr 7, 2026
Umbraco v8.14.1 - 'baseUrl' SSRF
CVE-2021-47776
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2- Range: 4.7.2, Release-4.5.2, Release-4.6.0, …
- ghsa-coords
Patches
Vulnerability mechanics
References
6- www.exploit-db.com/exploits/50462ghsaexploitWEB
- github.com/advisories/GHSA-h66j-xm43-47ppghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-47776ghsaADVISORY
- our.umbraco.comghsaWEB
- our.umbraco.commitreproduct
- releases.umbraco.com/all-releasesghsaproductWEB
News mentions
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