Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates < 5.4.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Slider and Post Carousel Widgets

Description

The Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via HTML attributes in Slider and Post Carousel widgets in all versions up to, and including, 5.4.0 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.