Shortcodes Ultimate < 7.4.1 - Contributor+ Stored XSS via 'data-url' Attribute

Description

The plugin is vulnerable to Stored Cross-Site Scripting via the 'data-url' DOM element attribute due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.