SunEditor Embed Plugin has DOM XSS via External Script Element After Iframe Embed

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...

NPM: SunEditor Embed Plugin has DOM XSS via External Script Element After Iframe Embed

NPM: SunEditor Embed Plugin has DOM XSS via External Script Element After Iframe Embed vulnerability discovered by ? in WordPress Npm suneditor versions = 3.1.3...

EUVD-2026-66595

SunEditor is a lightweight and powerful WYSIWYG editor in vanilla JavaScript with no dependencies. Prior to 3.1.4, the SunEditor Embed plugin in src/plugins/modal/embed.js parses attacker-controlled raw embed HTML with DOMParser and processes the resulting DOM nodes. When an external script eleme...