Medium severity · published Jan 15, 2026
CVE-2021-47776
Umbraco v8.14.1 - 'baseUrl' SSRF
5.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UM
Umbraco · umbraco
8.14.1 · source: vendor
UC
Umbraco Cms · Umbraco
8.14.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-47776
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-47776
exploit
https://www.exploit-db.com/exploits/50462
product
https://our.umbraco.com/
product
https://releases.umbraco.com/all-releases
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