CVE-2026-12111
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk20th percentile — higher than 20% of all known CVEs
Summary
The Appointment Booking Calendar plugin for WordPress is vulnerable to Sensitive Information Exposure in versions up to 1.4.01. This is due to insufficient authorization and missing per-calendar ownership checks in the cpabc_appointments_calendar_load2() function.
Risk Assessment
Authenticated attackers with Contributor-level access and above can access customer booking information, which may lead to privacy breaches and loss of user trust.
Recommendation
It is recommended to update the plugin to the latest version to mitigate this vulnerability and implement additional authorization checks for functions related to calendar data access.
Original NVD description (English source)
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.