Page Builder: Pagelayer <= 1.7.7 - Authenticated (Author+) Stored Cross-Site Scripting via Header/Footer

The Page Builder: Pagelayer – Drag and Drop website builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via header/footer post content in all versions up to, and including, 1.7.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.