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...

CVE-2026-31833 Umbraco has Stored XSS in UFM Rendering Pipeline via Permissive DOMPurify Attribute Filtering

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-2025-14202

A vulnerability in the file upload at bookmark + asset rendering pipeline allows an attacker to upload a malicious SVG file with JavaScript content. When an authenticated admin user views the SVG file with embedded JavaScript code of shared bookmark, JavaScript executes in the admin’s browser,...

CVE-2022-45928

A remote OScript execution issue was discovered in OpenText Content Suite Platform 22.1 16.2.19.1803. Multiple endpoints allow the user to pass the parameter htmlFile, which is included in the HTML output rendering pipeline of a request. Because the Content Server evaluates and executes Oscript...

CVE-2022-45928

OpenText Content Suite Platform 22.1 (16.2.19.1803) is affected by a remote OScript execution vulnerability. Multiple endpoints accept the htmlFile parameter, which is processed in the HTML rendering pipeline and can trigger Oscript code execution in the Content Server. The underlying risk is tha...