Description
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.
References6
- github.com/alextselegidis/easyappointments
- github.com/alextselegidis/easyappointments/blob/4bc7ecd51f3dade…
- github.com/alextselegidis/easyappointments/commit/09c6fb30b6aac…
- hackmd.io/@haind/easyappointments-booking-register-appointment-…
- www.vulncheck.com/advisories/easy-appointments-through-1.6.0-au…
- hackmd.io/@haind/easyappointments-booking-register-appointment-…
Metrics
- CVSS 3.1
-
8.2
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N - CVSS 4.0
-
8.8
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 28 · as of 11 November 2026
- CWE
- CWE-639
Could this be exploited in your environment?
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