The SurveyFunnel – Survey Plugin for WordPress plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.1.5 via several unprotected /wp-json/surveyfunnel/v2/ REST API endpoints. This makes it possible for unauthenticated attackers to extract sensitive data from survey responses.
https://github.com/wpeka/surveyfunnel-lite/blob/master/includes/class-surveyfunnel-lite-rest-api.php