SiteOrigin Widgets Bundle < 1.69.0 - Contributor+ Stored XSS via `data-url` DOM Element 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.