CVE-2026-18496
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductBooking Calendar
PublishedOct 10, 2026
First seenOct 10, 2026
Weakness typeCWE-200Sensitive information exposure
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| wpdevelop Booking Calendar | v ≤ 11.4.3 | — |
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