CVE-2026-5465: The Booking for Appointments and Events Calendar – Amelia plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and…

PriorityP261high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

0.63%

45.7th percentile

The Booking for Appointments and Events Calendar – Amelia plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.1.3. This is due to the `UpdateProviderCommandHandler` failing to validate changes to the `externalId` field when a Provider (Employee) user updates their own profile. The `externalId` maps directly to a WordPress user ID and is passed to `wp_set_password()` and `wp_update_user()` without authorization checks. This makes it possible for authenticated attackers, with Provider-level (Employee) access and above, to take over any WordPress account — including Administrator — by injecting an arbitrary `externalId` value when updating their own provider profile.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
ameliabooking	booking_for_appointments_and_events_calendar_amelia	<= 2.1.3	—

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