CVE-2016-20068: Dwbooster Booking Calendar Contact Form

High severity, CVSS 8.2. EPSS: 0.3% chance of exploitation in the next 30 days.

WordPress Booking Calendar Contact Form version 1.0.23 contains an unauthenticated blind SQL injection vulnerability that allows remote attackers to execute arbitrary SQL queries by injecting malicious code through the 'id' parameter. Attackers can send requests to the admin-ajax.php endpoint with the action parameter set to 'dex_bccf_calendar_ajaxevent' and supply crafted SQL commands in the 'id' parameter to extract sensitive database information.

Affected products

• Dwbooster Booking Calendar Contact Form: up to and including 1.0.23

Published 2026-06-15. Last modified 2026-06-17.