CVE-2024-55488 Details
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.
A stored cross-site scripting vulnerability has been identified in Umbraco CMS versions through 14.3.1. This vulnerability allows authenticated users with access to the CMS to execute arbitrary web scripts or HTML by injecting a crafted payload. The issue arises from a lack of server-side input sanitization in the rich text editing feature, which uses TinyMCE as the editor. While the client-side editor attempts to sanitize input, the server-side API does not, leaving a gap that can be exploited by sending HTTP requests to update documents with malicious content.
Umbraco has acknowledged this vulnerability but has not implemented a server-side fix. CMS administrators are advised to apply their own input sanitization using the IHtmlSanitizer interface or to avoid using the rich text editor altogether.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jan 22, 2025References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| umbraco umbraco cms | 14.3.1 |
CPE
Remediation
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Change History
8 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 5, 2026 | CVE Modified | [email protected] |
| Jul 5, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Dec 31, 2025 | Initial Analysis | [email protected] |
| Feb 12, 2025 | CVE Modified | [email protected] |
| Feb 6, 2025 | CVE Modified | CISA-ADP |
| Jan 22, 2025 | New CVE Received | [email protected] |