CVE-2026-52839
Easy!Appointments appointments/store and appointments/update allow cross-provider appointment injection — Authorization Bypass
Impact
Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 correctly filter provider-scoped appointments in the `appointments/search` response, proving that provider isolation is an intended security boundary. However, the direct mutation endpoints `appointments/store` and `appointments/update` only check generic appointment privileges and never verify that the submitted `id_users_provider` belongs to the current session. A normal authenticated provider can inject new appointments into another provider's schedule via `store`, or reassign existing appointments into a foreign provider's calendar via `update`. The `store` path contains an additional write-before-crash bug: the unauthorized row is committed to the database before the controller crashes on a type error, so the attacker receives an error response while the foreign appointment is already persisted. Version 1.6.0 patches the issue.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | alextselegidis/easyappointments | <= 1.5.2 | 1.6.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-w8xc-8g92-v77h
- https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-w8xc-8g92-v77h
- https://nvd.nist.gov/vuln/detail/CVE-2026-52839
- https://github.com/alextselegidis/easyappointments/commit/725eafa647308846ce887657db12771a829e42ef
- https://github.com/alextselegidis/easyappointments/releases/tag/1.6.0