AD Sliding FAQ <= 2.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

The AD Sliding FAQ plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sliding_faq' shortcode in all versions up to, and including, 2.4 due to insufficient input sanitization and output escaping on user supplied attributes. 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.