What is CVE-2026-18496?

CVE-2026-18496 is a medium-severity vulnerability in Wpdevelop Booking Calendar, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-10-10.

How severe is CVE-2026-18496?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Wpdevelop Booking Calendar

CVE-2026-18496

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.

Vulnerability class: Information Disclosure

Published 2026-10-10.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Wpdevelop Booking Calendar

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

Frequently asked questions

What is CVE-2026-18496?: CVE-2026-18496 is a medium-severity vulnerability in Wpdevelop Booking Calendar, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-10-10.
How severe is CVE-2026-18496?: Medium severity. CVSS v3 base score is 5.3 out of 10.