CVE-2025-24011: Umbraco CMS

Medium severity, CVSS 5.3. EPSS: 1.5% chance of exploitation in the next 30 days.

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.

Affected products

• Umbraco Umbraco CMS: from 14.0.0, before 14.3.2 (fixed in 14.3.2); from 15.0.0, before 15.1.2 (fixed in 15.1.2)

Published 2025-01-21. Last modified 2026-06-17.