CVE-2026-5465
Amelia <= 2.1.3 - Insecure Direct Object Reference to Authenticated (Employee+) Privilege Escalation via 'externalId' Parameter
- Published
- Apr 7, 2026
- Updated
- Apr 8, 2026
- Assigning CNA
- Wordfence
- Evidence observed
- Aug 25, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 48.6%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1- CVE-2026-5465Exploit
Exploit and analysis for CVE-2026-5465, an IDOR in Amelia WordPress plugin allowing authenticated Provider role to escalate privileges and achieve account takeover via insecure direct object reference.
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