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 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.

CVSS v3.1

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.63% chance of exploitation in the next 30 days, 48th percentile

Published

2026-04-07

Updated

2026-04-08

Proof-of-concept exploits (1)

• kaleth4/CVE-2026-54650★ · 2026-04-07

References

• CVE Record
• NVD entry

Related

• CVE-2014-6271
• CVE-2019-7711
• CVE-2021-44228
• CVE-2022-30190
• CVE-2024-6387
• CVE-2024-6409