PT-2026-54952 · Wappointment · Appointment Bookings For Zoom Googlemeet/More – Wappointment
Davidfdzmorilla
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Published
2026-07-02
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Updated
2026-07-02
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CVE-2026-9188
CVSS v3.1
5.3
Medium
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
The Appointment Bookings for Zoom GoogleMeet and more – Wappointment plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to and including 2.7.6 via the
appointmentkey parameter due to the appointment edit key — the sole authorization token consumed by tryCancel() — being generated as a predictable, unsalted MD5 hash of only client id (a sequential integer), start at (a publicly observable appointment timestamp), and staff id (a small enumerable integer), with no secret salt or random component, and the unauthenticated cancellation and rescheduling REST endpoints performing no ownership or identity verification beyond matching this reconstructible key. This makes it possible for unauthenticated attackers to compute valid edit key values for appointments belonging to other users and cancel or reschedule those appointments arbitrarily. Exploitation requires the allow cancellation or allow rescheduling setting to be enabled on the site, both of which are common configurations for active booking deployments; an attacker can obtain the inputs needed to reconstruct a victim's key by booking their own appointment to observe their sequential client id and correlating publicly visible appointment times and enumerable staff identifiers.Fix
IDOR
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Weakness Enumeration
Related Identifiers
Affected Products
Appointment Bookings For Zoom Googlemeet/More – Wappointment