CVE-2021-47776

MEDIUM EPSS 26.1%

Published Jan 15, 20265mo ago · Modified Jun 17, 20261w ago

6.9 CVSS 4.0

Medium

Published Jan 15, 2026 5mo ago

Last Modified Jun 17, 2026 1w ago

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 Details

Base Score

6.9

Exploitability

—

Impact

—

Vector string

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

26.1% percentile

Exploit & Patch Status

Public Exploit Known

No Patch Available

Weaknesses 1

CWE-918 Server-Side Request Forgery (SSRF) Validation

Affected Products 1

Vendor	Product	Version	Range
umbraco	umbraco_cms	8.14.1	any

References 3

our.umbraco.com https://our.umbraco.com/

Product
releases.umbraco.com https://releases.umbraco.com/all-releases

Release Notes
exploit-db.com https://www.exploit-db.com/exploits/50462

ExploitVDB Entry

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.