Authorization Bypass Through User-Controlled Key Affecting alextselegidis/easyappointments package, versions <1.6.0
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Authorization Bypass Through User-Controlled Key vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-PHP-ALEXTSELEGIDISEASYAPPOINTMENTS-17972366
- published14 Jul 2026
- disclosed14 Jul 2026
- creditUnknown
Introduced: 14 Jul 2026
NewCVE-2026-52841 (opens in a new tab)How to fix?
Upgrade alextselegidis/easyappointments to version 1.6.0 or higher.
Overview
alextselegidis/easyappointments is a powerful Open Source Appointment Scheduler that can be installed on your server.
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the oauth_callback process. An attacker can access and modify another user's Google sync configuration by rebinding a peer provider's Google account to one they control, resulting in unauthorized synchronization of appointment data, including customer names and emails, into the attacker's calendar.