Easy!Appointments has unauthenticated customer PII disclosure on booking reschedule page
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure, Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200 and CWE-639.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| alextselegidis | easyappointments | before 1.6.0 | 1.6.0 | Patch available | CNA |
| — | alextselegidis/easyappointments (Packagist) | up to 1.5.2 | — | No fix listed | GHSA-xgr6-pqjv-3pf8 |
- easyappointments Vendoralextselegidis Affected before 1.6.0 Fixed in 1.6.0 Patch available CNA
- alextselegidis/easyappointments (Packagist) Vendor— Affected up to 1.5.2 Fixed in — No fix listed GHSA-xgr6-pqjv-3pf8
Remediation
- Fix · CNA easyappointments (alextselegidis) Fixed in 1.6.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-52837
- 2026-10-03 Alias added: GHSA-xgr6-pqjv-3pf8
References
Other 4
- https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-xgr6-pqjv-3pf8
- https://github.com/alextselegidis/easyappointments/commit/40bb0b31b531540bc9006efce4220eb0a437ed2b
- https://github.com/alextselegidis/easyappointments
- https://github.com/alextselegidis/easyappointments/releases/tag/1.6.0
More alextselegidis vulnerabilities
- TI-2023-01200 Use of Hard-coded Credentials in alextselegidis/easyappointments CVSS 3.1CRITICAL 9.8
- TI-2026-70736 Easy!Appointments authorization bypass lets attackers modify bookings CVSS 4.0HIGH 8.8
- TI-2024-37956 An issue in Alex Tselegidis EasyAppointments v.1.5.0 allows a remote attacker to escalate… CVSS 3.1CRITICAL 9.8
- TI-2026-19023 CSRF Protection Bypass: Sensitive endpoints accept GET requests, enabling admin account takeover CVSS 4.0HIGH 7.4
- TI-2025-32119 alextselegidis Easy!Appointments v1.5.1 was discovered to contain a SQL injection… CVSS 3.1HIGH 8.1
- TI-2023-01980 Session Fixation in alextselegidis/easyappointments CVSS 3.1HIGH 8.8
Sources
- CVE-2026-52837 · CVE Program
- CVE-2026-52837 · NVD
- FIRST EPSS
- GHSA-xgr6-pqjv-3pf8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences