What is the CVSS score of CVE-2025-24012?

CVE-2025-24012 has a CVSS 3.1 base score of 4.6 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.9%.

Which versions of Umbraco Cms are affected by CVE-2025-24012?

Organizations using version 14.0.0 and should be aware of moderate risk from CVE-2025-24012, a cross-site scripting vulnerability rated CVSS 4.6.. A patch is available.

How to fix or mitigate CVE-2025-24012?

During next maintenance window: Identify affected systems running version 14.0.0 and and apply vendor patches when convenient. Verify Content-Security-Policy and output encoding.

Umbraco Cms CVE-2025-24012

MEDIUM

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

2025-01-21 security-advisories@github.com

XSS Umbraco Cms

4.6

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.6 MEDIUM

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:04 vuln.today

Patch released

Mar 28, 2026 - 18:04 nvd

Patch available

CVE Published

Jan 21, 2025 - 16:15 nvd

MEDIUM 4.6

DescriptionGitHub Advisory

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, authenticated users are able to exploit a cross-site scripting vulnerability when viewing certain localized backoffice components. Versions 14.3.2 and 15.1.2 contain a patch.

AnalysisAI

Umbraco is a free and open source .NET content management system. Rated medium severity (CVSS 4.6), this vulnerability is remotely exploitable, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.

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. 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, authenticated users are able to exploit a cross-site scripting vulnerability when viewing certain localized backoffice components. Versions 14.3.2 and 15.1.2 contain a patch. Affected products include: Umbraco Umbraco Cms. Version information: version 14.0.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.