What’s Vulnerable › Vulnerabilities

CVE-2026-52837: Easy!Appointments has unauthenticated customer PII disclosure on booking reschedule page

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-14 · updated 2026-10-24
• Weakness: CWE-200

Description

Easy!Appointments is a self hosted appointment scheduler. In versions up to and including 1.5.2, 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. Version 1.6.0 contains a patch.

Affected products

• alextselegidis/easyappointments: before 1.6.0

References

• https://github.com/alextselegidis/easyappointments/commit/40bb0b31b531540bc9006efce4220eb0a437ed2b
• https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-xgr6-pqjv-3pf8
• https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-xgr6-pqjv-3pf8

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