CVE-2024-55488: Umbraco CMS

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A stored cross-site scripting (XSS) vulnerability in Umbraco CMS v14.3.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload. NOTE: This has been disputed by the vendor since this potential attack is only possible via authenticated users who have been manually allowed access to the CMS. There was a deliberate decision made not to apply HTML sanitization at the product level.

Affected products

• Umbraco Umbraco CMS: version 14.3.1 only

Published 2025-01-22. Last modified 2026-07-05.