What is the CVSS score of CVE-2024-55488?

CVE-2024-55488 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.3%.

Which versions of Umbraco Cms are affected by CVE-2024-55488?

Organizations using Umbraco CMS should be aware of notable risk from CVE-2024-55488, a cross-site scripting vulnerability rated CVSS 6.5.

Is there a public PoC exploit available for CVE-2024-55488?

Yes, a public proof-of-concept exploit is available for CVE-2024-55488. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2024-55488?

Within 7 days: Identify affected systems running Umbraco CMS and apply vendor patches promptly. Verify Content-Security-Policy and output encoding.

Umbraco Cms CVE-2024-55488

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-01-22 cve@mitre.org

XSS Umbraco Cms

6.5

CVSS 3.1 · Vendor: mitre

Severity by source

Vendor (mitre) PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Primary rating from Vendor (mitre) · only source for this CVE.

CVSS VectorVendor: mitre

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:05 vuln.today

PoC Detected

Dec 31, 2025 - 14:51 vuln.today

Public exploit code

CVE Published

Jan 22, 2025 - 16:15 nvd

MEDIUM 6.5

DescriptionCVE.org

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.

AnalysisAI

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. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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 include: Umbraco Umbraco Cms.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.