CVE-2026-12111
Received Received - Intake
Appointment Booking Calendar Sensitive Information Exposure

Publication date: 2026-06-18

Last updated on: 2026-06-18

Assigner: Wordfence

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.
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Meta Information
Published
2026-06-18
Last Modified
2026-06-18
Generated
2026-06-18
AI Q&A
2026-06-18
EPSS Evaluated
N/A
NVD
CVE-2026-12111
EUVD
EUVD-2026-37864
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
wpbookingcalendar appointment_booking_calendar to 1.4.01 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-200 The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
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Executive Summary

The Appointment Booking Calendar plugin for WordPress has a vulnerability in versions up to and including 1.4.01 that allows sensitive information exposure. This happens because the function cpabc_appointments_calendar_load2() does not properly check calendar ownership and only verifies if the user is an admin and has the capability to edit posts, which Contributor-level users and above have. As a result, an authenticated attacker with Contributor-level access can supply an arbitrary calendar ID and access customer booking details from any calendar managed by the plugin.

Impact Analysis

This vulnerability can lead to unauthorized disclosure of sensitive customer booking information. Attackers with Contributor-level access can extract personal data such as email addresses, names, phone numbers, booking times, and comments from any calendar. This exposure can compromise customer privacy and potentially lead to further exploitation or misuse of the leaked information.

Compliance Impact

This vulnerability allows authenticated users with Contributor-level access and above to extract sensitive customer booking information such as email addresses, names, phone numbers, booking times, and comments from any calendar managed by the plugin.

Exposure of such personal and sensitive information can lead to non-compliance with data protection regulations like GDPR and HIPAA, which require strict controls on access to personal data and mandate protection against unauthorized disclosure.

Therefore, organizations using the affected plugin versions may face compliance risks due to insufficient authorization controls that allow unauthorized data access.

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