373 matches found
EUVD-2026-10936
Umbraco has Stored XSS in UFM Rendering Pipeline via Permissive DOMPurify Attribute Filtering...
Umbraco has Stored XSS in UFM Rendering Pipeline via Permissive DOMPurify Attribute Filtering
Description An authenticated backoffice user with access to Settings can inject malicious HTML into property type descriptions. Due to an overly permissive attributeNameCheck configuration /.+/ in the UFM DOMPurify instance, event handler attributes such as onclick and onload, when used within...
GHSA-VRQC-59MW-QQG7 Umbraco has Stored XSS in UFM Rendering Pipeline via Permissive DOMPurify Attribute Filtering
Description An authenticated backoffice user with access to Settings can inject malicious HTML into property type descriptions. Due to an overly permissive attributeNameCheck configuration /.+/ in the UFM DOMPurify instance, event handler attributes such as onclick and onload, when used within...
Authorization Bypass Through User-Controlled Key
Overview Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via a backpoffice API endpoint. An attacker can modify domain-related data on content nodes without proper authorization by making crafted API calls as an authenticated user, even when...
Cross-site Scripting (XSS)
Overview @umbraco-cms/backoffice is a This package contains the types for the Umbraco Backoffice. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the UFM rendering pipeline. An attacker can execute arbitrary scripts in the context of authenticated users by injecti...
Improper Privilege Management
Overview Affected versions of this package are vulnerable to Improper Privilege Management due to insufficient authorization enforcement when modifying user group memberships. An attacker can gain higher-level privileges by assigning highly privileged roles without proper validation of their own...
Improper Privilege Management
Overview Affected versions of this package are vulnerable to Improper Privilege Management due to insufficient authorization enforcement when modifying user group memberships. An attacker can gain higher-level privileges by assigning highly privileged roles without proper validation of their own...
EUVD-2026-10934
Umbraco Backoffice API Allows Unauthorized Modification of Domain Data...
Umbraco Backoffice API Allows Unauthorized Modification of Domain Data
Description A broken object-level authorization vulnerability exists in a backoffice API endpoint that allows authenticated users to assign domain-related data to content nodes without proper authorization checks. The issue is caused by insufficient authorization enforcement on the affected API...
EUVD-2026-10935
Umbraco Backoffice API Allows Unauthorized Modification of Domain Data...
GHSA-FPVF-FVP5-996R Umbraco Backoffice API Allows Unauthorized Modification of Domain Data
Description A broken object-level authorization vulnerability exists in a backoffice API endpoint that allows authenticated users to assign domain-related data to content nodes without proper authorization checks. The issue is caused by insufficient authorization enforcement on the affected API...
CVE-2026-31834
Umbraco is an ASP.NET CMS. From 15.3.1 to before 16.5.1 and 17.2.2, A privilege escalation vulnerability has been identified in Umbraco CMS. Under certain conditions, authenticated backoffice users with permission to manage users, may be able to elevate their privileges due to insufficient...
CVE-2026-31832
Umbraco is an ASP.NET CMS. From 14.0.0 to before 16.5.1 and 17.2.2, A broken object-level authorization vulnerability exists in a backoffice API endpoint that allows authenticated users to assign domain-related data to content nodes without proper authorization checks. The issue is caused by...
CVE-2026-31833
Umbraco is an ASP.NET CMS. From 16.2.0 to before 16.5.1 and 17.2.2, An authenticated backoffice user with access to Settings can inject malicious HTML into property type descriptions. Due to an overly permissive attributeNameCheck configuration /.+/ in the UFM DOMPurify instance, event handler...
CVE-2026-31834
Umbraco CMS (ASP.NET) versions affected: 15.3.1 up to before 16.5.1 and 17.2.2. A privilege escalation vulnerability exists where authenticated backoffice users with permission to manage users may elevate privileges during modification of user group memberships due to insufficient authorization c...
CVE-2026-31834
Umbraco is an ASP.NET CMS. From 15.3.1 to before 16.5.1 and 17.2.2, A privilege escalation vulnerability has been identified in Umbraco CMS. Under certain conditions, authenticated backoffice users with permission to manage users, may be able to elevate their privileges due to insufficient...
CVE-2026-31834 Umbraco Affected by Vertical Privilege Escalation via Missing Authorization Checks
Umbraco is an ASP.NET CMS. From 15.3.1 to before 16.5.1 and 17.2.2, A privilege escalation vulnerability has been identified in Umbraco CMS. Under certain conditions, authenticated backoffice users with permission to manage users, may be able to elevate their privileges due to insufficient...
CVE-2026-31834 Umbraco Affected by Vertical Privilege Escalation via Missing Authorization Checks
Umbraco is an ASP.NET CMS. From 15.3.1 to before 16.5.1 and 17.2.2, A privilege escalation vulnerability has been identified in Umbraco CMS. Under certain conditions, authenticated backoffice users with permission to manage users, may be able to elevate their privileges due to insufficient...
CVE-2026-31834 Umbraco Affected by Vertical Privilege Escalation via Missing Authorization Checks
Umbraco is an ASP.NET CMS. From 15.3.1 to before 16.5.1 and 17.2.2, A privilege escalation vulnerability has been identified in Umbraco CMS. Under certain conditions, authenticated backoffice users with permission to manage users, may be able to elevate their privileges due to insufficient...
CVE-2026-31833
Summary : CVE-2026-31833 affects Umbraco (ASP.NET CMS). From 16.2.0 up to but not including 16.5.1 and 17.2.2, an authenticated backoffice user with Settings access can inject malicious HTML into property type descriptions due to an overly permissive attributeNameCheck in the UFM DOMPurify instan...