CVE-2026-87965: Easy Appointments < 4.0.2.2 - Unauthenticated Appointment Cancellation/Confirmation via Forgeable Email-Link Token

Q: Who can exploit this issue?

Any unauthenticated attacker can exploit it if they know or can guess an appointment's creation timestamp. No WordPress account or prior authentication is required.

Q: What actions could an attacker perform?

An attacker can use a forgeable mail-link token to cancel or confirm arbitrary appointments associated with timestamps they know or guess.

Q: Which installations are affected?

Easy Appointments WordPress plugin versions before 4.0.2.2 are affected.

Published Sep 18, 2026

Updated

The Easy Appointments WordPress plugin before 4.0.2.2 does not use an unguessable token to authorize its mail-link appointment cancellation and confirmation action, deriving the token from a hardcoded source-embedded salt and the appointment's creation timestamp, so unauthenticated attackers who know or guess that timestamp can cancel or confirm arbitrary appointments.

Affected Software

1 affected component

Easy Appointments WordPress plugin<4.0.2.2

Event History

Sep 18, 2026

CVE Published

via MITRE·06:00 AM

Data Sourced

via MITRE·06:00 AM

DescriptionWeakness

Frequently Asked Questions

Who can exploit this issue?

Any unauthenticated attacker can exploit it if they know or can guess an appointment's creation timestamp. No WordPress account or prior authentication is required.

What actions could an attacker perform?

An attacker can use a forgeable mail-link token to cancel or confirm arbitrary appointments associated with timestamps they know or guess.

Which installations are affected?

Easy Appointments WordPress plugin versions before 4.0.2.2 are affected.