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Vulnerability record · CVE-2026-5465 · published 7 April 2026

CVE-2026-5465: Insecure direct object reference vulnerability

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.

8.8 CVSS 3.1 High EPSS 0.56% · top 55.3% CWE-639 · Insecure direct object reference Deferred
8.8CVSS 3.1 base score
0.56%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

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

References

LinkTags
https://plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/src/Application/Commands/User/Provider/UpdateProvide
https://plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/src/Application/Commands/User/Provider/UpdateProvide
https://plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/src/Application/Commands/User/Provider/UpdateProvide
https://plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/src/Application/Controller/User/Provider/UpdateProvi
https://plugins.trac.wordpress.org/changeset/3499608/ameliabooking/trunk/src/Application/Commands/User/Provider/UpdatePr
https://www.wordfence.com/threat-intel/vulnerabilities/id/a4204099-1065-4167-8b42-3da25945236c?source=cve

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Related vulnerabilities

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8.4CVE-2026-55255Langflow IDOR in responses endpoint allows cross-user flow executionLangflow before 1.9.1 has an insecure direct object reference in the /api/v1/responses endpoint. An authenticated attacker can supply another user's …KEVEPSS 0.89%analysed

Source: NIST National Vulnerability Database (record CVE-2026-5465), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.