What’s Vulnerable › Vulnerabilities

CVE-2024-55488

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-01-22 · updated 2026-07-05
• Weakness: CWE-79

Description

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-CMS: 14.3.1

References

• https://docs.umbraco.com/umbraco-cms/develop-with-umbraco/templating-and-rendering/design/stylesheets-javascript
• https://www.nccgroup.com/us/research-blog/technical-advisory-cross-site-scripting-in-umbraco-rich-text-display/

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