CVE-2025-24011: Umbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response Codes
Impact
Based on an analysis of response codes and timing of Umbraco 14+ management API responses, it's possible to determine whether an account exists.
Patches
Patched in 14.3.2 and 15.1.2.
Workarounds
None available.
Other sources
Umbraco is a free and open source .NET content management system. Starting in version 14.0.0 and prior to versions 14.3.2 and 15.1.2, it's possible to determine whether an account exists based on an analysis of response codes and timing of Umbraco management API responses. Versions 14.3.2 and 15.1.2 contain a patch. No known workarounds are available.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2025-24011?
CVE-2025-24011 has a moderate severity level as it exposes account existence through response codes and timing.
How do I fix CVE-2025-24011?
To fix CVE-2025-24011, update Umbraco to version 14.3.2 or later, or to version 15.1.2.
What software versions are affected by CVE-2025-24011?
CVE-2025-24011 affects Umbraco versions between 14.0.0 and 14.3.1 and 15.0.0 and 15.1.1.
Are there any workarounds for CVE-2025-24011?
There are currently no available workarounds for CVE-2025-24011.
What type of vulnerability is CVE-2025-24011?
CVE-2025-24011 is an information disclosure vulnerability that allows for the enumeration of user accounts.