Disclosure summary
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.
Source-reported weakness categories
CWE-200
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
CVEProject/cvelistV5 releases · RSS-95eb7d8256449b8a75dc66291b65bfe37a2
Open original source · Updated Oct 10, 2026
CVE 2026-10-10_1400Z
CVE mention in publisher metadata; check the original affected versions.
NIST National Vulnerability Database · NVD-CVE-2026-18496
Open original source · Updated Oct 10, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
Original records & references
PUBLISHED 2026-10-10T02:16:42-04:00
MODIFIED 2026-10-10T02:16:42-04:00
INGESTED 2026-10-10T20:55:12-04:00