Auth bypass in Alextselegidis Easyappointments
CVE-2026-108758
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind/easyappointments-booking-register-appointment-takeover (third-party-advisory)
- github.com/alextselegidis/easyappointments/blob/4bc7ecd51f3dade8e041558f2c23dda… (technical-description)
- github.com/alextselegidis/easyappointments/commit/09c6fb30b6aac0830a820d6bec3d2… (patch)
- github.com/alextselegidis/easyappointments (product)
- www.vulncheck.com/advisories/easy-appointments-through-1.6.0-authorization-bypa… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-108758?
- CVE-2026-108758 is a high-severity vulnerability in Alextselegidis Easyappointments, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.2/10. Published 2026-10-11.
- How severe is CVE-2026-108758?
- High severity. CVSS v3 base score is 8.2 out of 10.