What’s Vulnerable › Vulnerabilities

CVE-2021-47776: Umbraco v8.14.1 - 'baseUrl' SSRF

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-15 · updated 2026-10-08
• Weakness: CWE-918

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.

Affected products

• Umbraco-CMS: 8.14.1

References

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

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