Shortcodes and extra features for Phlox theme <= 2.15.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'title_tag'

The Shortcodes and extra features for Phlox theme plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘title_tag’ parameter in all versions up to, and including, 2.15.7 due to insufficient input sanitization and output escaping. 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.