Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates < 4.5.4 - Contributor+ Stored XSS

Description

The Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates is vulnerable to Stored Cross-Site Scripting via the plugin's widgets due to insufficient input sanitization and output escaping on user supplied attributes such as listStyle. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.