---
id: CVE-2026-108758
title: >-
  Easy!Appointments through 1.6.0 contains an authorization bypass vulnerability
  in Booking::register() that allows unauthenticated attackers to modify any
  appointment by supplying an appointment id without its hash
summary: >-
  Easy!Appointments through 1.6.0 contains an authorization bypass vulnerability
  in Booking::register() that allows unauthenticated attackers to modify any
  appointment by supplying an appointment id without its hash. Attackers can
  enumerat…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N'
cwe:
  - CWE-639
published: '2026-10-11'
updated: '2026-10-11'
sourceUpdated: '2026-10-11T13:17:21.020'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108758'
references:
  - url: 'https://github.com/alextselegidis/easyappointments'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/alextselegidis/easyappointments/blob/4bc7ecd51f3dade8e041558f2c23dda65bd6c43e/application/controllers/Booking.php#L368-L587
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/alextselegidis/easyappointments/commit/09c6fb30b6aac0830a820d6bec3d2eb241daf150
    label: disclosure@vulncheck.com
  - url: >-
      https://hackmd.io/@haind/easyappointments-booking-register-appointment-takeover
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/easy-appointments-through-1.6.0-authorization-bypass-via-booking-register-endpoint
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-11T13:51:17.041Z'
---

## Overview

Easy!Appointments through 1.6.0 contains an authorization bypass vulnerability in Booking::register() that allows unauthenticated attackers to modify any appointment by supplying an appointment id without its hash. Attackers can enumerate sequential appointment ids with a self-asserted manage_mode flag to rewrite appointment details, rebind them to attacker-controlled customers, and obtain management hashes for rescheduling or cancellation.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.