Multiple SQL injection vulnerabilities in dex_reservations.php in the CP Reservation Calendar plugin before 1.1.7 for WordPress allow remote attackers to execute arbitrary SQL commands via the (1) id parameter in a dex_reservations_calendar_load2 action or (2) dex_item parameter in a dex_reservations_check_posted_data action in a request to the default URI.
https://wpvulndb.com/vulnerabilities/8193
https://wordpress.org/plugins/cp-reservation-calendar/changelog/
https://plugins.trac.wordpress.org/changeset/1104099/cp-reservation-calendar