CVE-2016-20070: Dwbooster Booking Calendar Contact Form

Medium severity, CVSS 6.4. EPSS: 0.2% chance of exploitation in the next 30 days.

WordPress Booking Calendar Contact Form 1.0.23 contains privilege escalation and stored cross-site scripting vulnerabilities that allow authenticated users to modify plugin options and inject malicious scripts by failing to verify user privileges and sanitize input parameters. Attackers with subscriber-level accounts can inject XSS payloads through parameters like price, name, calendar_language, and email_confirmation_to_user via admin-ajax.php and admin.php endpoints to execute arbitrary JavaScript in administrator browsers.

Affected products

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

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