Bold Page Builder < 4.7.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via class

Description

The Bold Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the css class in versions up to, and including, 4.7.6 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.