CVE-2026-52841: Alextselegidis Easyappointments

Low severity, CVSS 3.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, `Google::oauth` at `application/controllers/Google.php:278` stores its URL-supplied `provider_id` in the session, and `oauth_callback` saves the issued Google OAuth token against that row without checking the caller owns the provider. Any logged-in backend user (admin, provider, or secretary) rebinds a peer provider's Google sync to a Google account they control. The peer's appointments then sync into the attacker's calendar with each customer's name and email attached as attendee data. Version 1.6.0 patches the issue.

Affected products

• Alextselegidis Easyappointments: before 1.6.0 (fixed in 1.6.0)

Published 2026-07-14. Last modified 2026-07-14.