Essential Blocks < 4.5.10 - Contributor+ DOM-Based XSS via Social Icons Block

Description

The plugin is vulnerable to Stored Cross-Site Scripting via the "Social Icons" block due to insufficient input sanitization and output escaping on user supplied attributes. 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.