What the vulnerability does
01Description
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.
Explanation of Vulnerability in Simple Terms
02Summary
The Simply Schedule Appointments Booking Plugin for WordPress contains a SQL injection vulnerability in versions up to 1.6.10.0. An attacker can craft malicious input to execute arbitrary SQL queries against the site's database without authentication. This allows reading sensitive data such as user credentials, appointment details, and other stored information. Sites using affected versions should update immediately.
What an attacker can do
03Attacker Capabilities
Read sensitive data from the site's database, including user credentials and appointment information.
Potential impact on your site
04Site Impact
Attackers can extract user data, credentials, and appointment records from your database without logging in.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
March 19, 2026
CVE published
April 8, 2026
Record updated
