Strong Testimonials <= 3.2.16 - Unauthenticated Arbitrary Shortcode Execution

The Strong Testimonials plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 3.2.16. This is due to the software allowing users to submit a testimonial in which a value is not properly validated or sanitized prior to being passed to a do_shortcode call. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes if an administrator previews or publishes a crafted testimonial.