CVE-2026-18496CWE-200information-disclosure

CVE-2026-18496

Medium · published October 10, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
11.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00214 · 11.2th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-10-10T10:16Z
References (2)
https://plugins.trac.wordpress.org/changeset/3633943/booking · [email protected]https://www.wordfence.com/threat-intel/vulnerabilities/id/1ebfb030-c9b7-477a-8fe3-78e97da6bea9?source=cve · [email protected]
EPSS history
Timeline
  • 11 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 10 OCT 05:30Z
    Booking Calendar <= 11.4.3 - Unauthenticated Sensitive Information Exposure in 'WPBC_FLEXTIMELINE_NAV' AJAX Action
    cvelistv5
  • 10 OCT 05:30Z
    Booking Calendar <= 11.4.3 - Unauthenticated Sensitive Information Exposure in 'WPBC_FLEXTIMELINE_NAV' AJAX Action
    cvelistv5