Medium severity5.3OSV Advisory· Published Jan 15, 2026· Updated Jun 17, 2026
CVE-2021-47776
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
34.7.2, Release-4.5.2, Release-4.6.0, …+ 1 more
- (no CPE)range: 4.7.2, Release-4.5.2, Release-4.6.0, …
- cpe:2.3:a:umbraco:umbraco_cms:8.14.1:*:*:*:*:*:*:*
- ghsa-coords
Patches
Vulnerability mechanics
References
6- www.exploit-db.com/exploits/50462nvdExploitVDB EntryWEB
- github.com/advisories/GHSA-h66j-xm43-47ppghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-47776ghsaADVISORY
- our.umbraco.comghsaWEB
- our.umbraco.comnvdProduct
- releases.umbraco.com/all-releasesnvdRelease NotesWEB
News mentions
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