Generate PDF using Contact Form 7 <= 3.5 - Authenticated (Administrator+) Stored Cross-Site Scripting

The Generate PDF using Contact Form 7 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via several of its settings parameters in versions up to, and including, 3.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with adminstrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.