The Ninja Beaver Add-ons for Beaver Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's widgets in all versions up to, and including, 2.4.5 due to insufficient input sanitization and output escaping on user supplied attributes such as urls. 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.