CVE-2026-52837: Easy!Appointments has unauthenticated customer PII disclosure on booking reschedule page
The booking reschedule view at /index.php/booking/reschedule/{appointment_hash} (handled by Booking::index()) embeds the entire customer record as inline JavaScript (const vars = {... "customer_data": {...}, ...}) without authentication and without field whitelisting. Anyone in possession of the 12-character appointment_hash — which appears in plain text in reschedule emails, confirmation page URLs, and operator-side calendar links — can read every column of that customer’s row in the ea_users table.
Verified against v1.5.2 with a Docker reproduction; a single anonymous GET to the reschedule URL returns 13 customer fields including email, phone, full address, custom fields, timezone, language, LDAP DN, and id_roles.
References
- github.com/advisories/GHSA-xgr6-pqjv-3pf8
- github.com/alextselegidis/easyappointments/commit/40bb0b31b531540bc9006efce4220eb0a437ed2b
- github.com/alextselegidis/easyappointments/releases/tag/1.6.0
- github.com/alextselegidis/easyappointments/security/advisories/GHSA-xgr6-pqjv-3pf8
- nvd.nist.gov/vuln/detail/CVE-2026-52837
Code Behaviors & Features
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