Authorization Bypass Through User-Controlled Key Affecting alextselegidis/easyappointments package, versions <1.6.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PHP-ALEXTSELEGIDISEASYAPPOINTMENTS-17972363
- published14 Jul 2026
- disclosed14 Jul 2026
- creditUnknown
Introduced: 14 Jul 2026
NewCVE-2026-52839 (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 through the appointments/store and appointments/update endpoints. An attacker can manipulate appointment data belonging to other providers by submitting requests with a forged id_users_provider value. This allows unauthorized modification or creation of appointments in another provider's schedule.