Cross-site Scripting (XSS)

Overview Umbraco.Cms.Web.Common is a package containing the web assembly needed to run Umbraco CMS. Affected versions of this package are vulnerable to Cross-site Scripting XSS when viewing previewed content. Details Cross-site scripting or XSS is a code vulnerability that occurs when an attacker...

GHSA-69CG-W8VM-H229 XSS/HTML Injection Vulnerability in Umbraco Preview Badge

Impact Authenticated users are able to exploit an XSS vulnerability when viewing previewed content. Patches Will be patched in 10.8.8, 13.5.3, 14.3.2 and 15.1.2. Workarounds None available...

Umbraco Allows User Enumeration Feasible Based On Management API Timing and Response Codes

Impact Based on an analysis of response codes and timing of Umbraco 14+ management API responses, it's possible to determine whether an account exists. Patches Patched in 14.3.2 and 15.1.2. Workarounds None available...

GHSA-HMG4-WWM5-P999 Umbraco Allows User Enumeration Feasible Based On Management API Timing and Response Codes

Impact Based on an analysis of response codes and timing of Umbraco 14+ management API responses, it's possible to determine whether an account exists. Patches Patched in 14.3.2 and 15.1.2. Workarounds None available...

Information Exposure

Overview Affected versions of this package are vulnerable to Information Exposure which allows an attacker to determine the existence of user accounts by analyzing the response times and codes. Remediation Upgrade Umbraco.Cms.Core to version 14.3.2, 15.1.2 or higher. References - GitHub Commit -...

Information Exposure

Overview Affected versions of this package are vulnerable to Information Exposure which allows an attacker to determine the existence of user accounts by analyzing the response times and codes. Remediation Upgrade Umbraco.Cms.Api.Management to version 14.3.2, 15.1.2 or higher. References - GitHub...

XSS/HTML Injection Vulnerability in Umbraco Backoffice Components

Impact Authenticated users are able to exploit an XSS vulnerability when viewing certain localized backoffice components. Patches Will be patched in 14.3.2 and 15.1.2. Note: This issue was reported by Pratik Patil from NetSPI @Nexusss-ppatil...

GHSA-WV8V-RMW2-25WC XSS/HTML Injection Vulnerability in Umbraco Backoffice Components

Impact Authenticated users are able to exploit an XSS vulnerability when viewing certain localized backoffice components. Patches Will be patched in 14.3.2 and 15.1.2. Note: This issue was reported by Pratik Patil from NetSPI @Nexusss-ppatil...

CVE-2025-24011

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, it's possible to determine whether an account exists based on an analysis of response codes and timing of Umbraco management API responses. Versions 14.3.2 and...

CVE-2025-24012

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 conta...

CVE-2025-24012 Umbraco Backoffice Components Have XSS/HTML Injection Vulnerability

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 conta...

CVE-2025-24012

Umbraco Backoffice XSS (CVE-2025-24012): An authenticated user can trigger cross-site scripting when viewing certain localized backoffice components. Affected versions are 14.0.0 up to, but not including, 14.3.2 and 15.1.2. Patches are provided in 14.3.2 and 15.1.2. Remediation: upgrade Umbraco.C...

CVE-2025-24012 Umbraco Backoffice Components Have XSS/HTML Injection Vulnerability

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 conta...

CVE-2025-24012 Umbraco Backoffice Components Have XSS/HTML Injection Vulnerability

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 conta...

CVE-2025-24011 Umbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response Codes

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, it's possible to determine whether an account exists based on an analysis of response codes and timing of Umbraco management API responses. Versions 14.3.2 and...

CVE-2025-24011 Umbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response Codes

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, it's possible to determine whether an account exists based on an analysis of response codes and timing of Umbraco management API responses. Versions 14.3.2 and...

CVE-2025-24011

Summary: CVE-2025-24011 affects Umbraco CMS (.NET). From 14.0.0 up to, but not including, 14.3.2 and 15.1.2, an attacker can determine whether an account exists by analyzing response codes and timing of the management API. Impact: information exposure; no availability/integrity impact claimed. Ve...

CVE-2025-24011 Umbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response Codes

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, it's possible to determine whether an account exists based on an analysis of response codes and timing of Umbraco management API responses. Versions 14.3.2 and...

PT-2025-5259 · Umbraco · Umbraco

Name of the Vulnerable Software and Affected Versions: Umbraco versions 14.0.0 through 14.3.1 Umbraco versions 15.0.0 through 15.1.1 Description: The issue allows authenticated users to exploit a cross-site scripting vulnerability when viewing certain localized backoffice components...

Umbraco 信息泄露漏洞

Umbraco is an open source content management system CMS written in C from Umbraco, Denmark. An information disclosure vulnerability exists in Umbraco version 14.0.0 and earlier, which stems from the ability to determine the existence of an account based on an analysis of the response code and the...