CVE-2016-20070 — WordPress Booking Calendar Contact Form 1.0.23 Privilege Escalation Stored XSS
WordPress Booking Calendar Contact Form 1.0.23 contains privilege escalation and stored cross-site scripting vulnerabilities that allow authenticated users to modify plugin opti…
Published: 2026-06-15 · CVSS: 5.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7