Advisories for Npm/Suneditor package

SUNEDITOR v2.47.10 appears to allow JavaScript execution through crafted namespaced HTML elements. The sanitization logic does not fully remove executable event-handler attributes from certain custom/namespaced tags. As a result, an attacker may be able to inject HTML content that executes JavaScript when the rendered element is interacted with. This behavior was observed after the changes introduced in this commit: https://github.com/JiHong88/suneditor/commit/9ed405fb0de676e56cd0e6a13c19c103ad5948d3

Summary A DOM-based Cross-Site Scripting (XSS) vulnerability exists in the SunEditor Embed plugin. Crafted iframe embed HTML followed by an external element bypasses the plugin’s sanitization logic. The plugin recreates and appends the attacker-controlled script element to the live DOM, causing JavaScript execution in the context of the editor page. If an application stores or reflects SunEditor content without additional backend sanitization, this can lead to stored or reflected XSS …