[ CVE-2026-18496 · Published 10 Oct 2026 ]
Vulnerability in wpdevelop Booking Calendar
CVSS 5.3
EPSS <1%No fix listed yet
[ Description ]Official description
The Booking Calendar plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 11.4.3 via the wpbc_is_show_popover_in_flex_timeline() function. This makes it possible for unauthenticated attackers to extract sensitive data including names, email addresses, and phone numbers of customers who have made bookings.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.