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CVE-2026-12111

MEDIUM 4.3 CVSS 3.1
Published
June 18, 2026
Last modified
June 18, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-200
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Description

The Appointment Booking Calendar plugin for WordPress is vulnerable to Sensitive Information Exposure in versions up to, and including, 1.4.01. This is due to insufficient authorization and missing per-calendar ownership checks in the cpabc_appointments_calendar_load2() function, which is reachable via the cpabc_calendar_load2=1 query parameter in wp-admin and only checks is_admin() && current_user_can('edit_posts'), a capability available to Contributor-level users and above. This makes it possible for authenticated attackers with Contributor-level access and above to supply an arbitrary calendar ID via the id parameter and extract customer booking information, including email addresses, names, phone numbers, booking times, and comments, from any calendar managed by the plugin.

Affected WordPress components

  • Appointment Booking Calendar Plugin · appointment-booking-calendar
    Confirmed match Active
    Up to and including 1.4.01
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • codepeople Appointment Booking Calendar — Up to and including 1.4.01

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/appointment-booking-calendar/tags/1.3.99/cpabc_appointments.php#L142
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/appointment-booking-calendar/tags/1.3.99/inc/cpabc_apps_go.inc.php#L1018
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/appointment-booking-calendar/tags/1.3.99/inc/cpabc_apps_go.inc.php#L1019
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/appointment-booking-calendar/tags/1.3.99/inc/cpabc_apps_go.inc.php#L945
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/appointment-booking-calendar/trunk/cpabc_appointments.php#L142
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/appointment-booking-calendar/trunk/inc/cpabc_apps_go.inc.php#L1018
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/appointment-booking-calendar/trunk/inc/cpabc_apps_go.inc.php#L1019
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/appointment-booking-calendar/trunk/inc/cpabc_apps_go.inc.php#L945
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3570448%40appointment-booking-calendar&new=3570448%40appointment-booking-calendar&sfp_email=&sfph_mail=
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/e1ecc237-87b0-4c4d-94cc-d3af9c6669c5?source=cve
  • nvd.nist.gov Official NVD record