Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin, CVE-2026-3658

CVE, Research URL: CVE-2026-3658
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Published on: Mar 19, 2026
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to SQL Injection via the 'fields' parameter in all versions up to, and including, 1.6.10.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database, including usernames, email addresses, and password hashes.
Affected versions: max 1.6.10.2.
Status: vulnerable