The Van Ons WP GDPR Compliance (aka wp-gdpr-compliance) plugin before 1.4.3 for WordPress allows remote attackers to execute arbitrary code because $wpdb->prepare() input is mishandled, as exploited in the wild in November 2018.
https://www.wordfence.com/blog/2018/11/trends-following-vulnerability-in-wp-gdpr-compliance-plugin/
https://wpvulndb.com/vulnerabilities/9144
https://wordpress.org/plugins/wp-gdpr-compliance/#developers