CVE-2026-5465: CWE-639 Authorization Bypass Through User-Controlled Key in ameliabooking Booking for Appointments and Events Calendar – Amelia
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.
AI Analysis
Technical Summary
CVE-2026-5465 is an authorization bypass vulnerability in the Amelia Booking plugin for WordPress (versions up to 2.1.3). The flaw arises from insufficient validation of the externalId field in the UpdateProviderCommandHandler. This field maps directly to WordPress user IDs and is passed to wp_set_password() and wp_update_user() without verifying the attacker's authorization to modify the targeted user. Consequently, an authenticated user with Provider-level privileges can inject an arbitrary externalId value to assume control over any WordPress account, including administrators. The vulnerability is classified under CWE-639 (Authorization Bypass Through User-Controlled Key) and carries a CVSS 3.1 score of 8.8, indicating high severity.
Potential Impact
Successful exploitation allows an authenticated attacker with Provider-level access to escalate privileges and take over any WordPress user account, including administrators. This can lead to full site compromise, including data theft, site defacement, or further malicious activity. The vulnerability affects all plugin versions up to and including 2.1.3.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are currently available. Until a patch is released, restrict Provider-level user access where possible and monitor for suspicious activity. Avoid granting Provider-level privileges to untrusted users. Follow the vendor's advisory for updates on remediation.
CVE-2026-5465: CWE-639 Authorization Bypass Through User-Controlled Key in ameliabooking Booking for Appointments and Events Calendar – Amelia
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-5465 is an authorization bypass vulnerability in the Amelia Booking plugin for WordPress (versions up to 2.1.3). The flaw arises from insufficient validation of the externalId field in the UpdateProviderCommandHandler. This field maps directly to WordPress user IDs and is passed to wp_set_password() and wp_update_user() without verifying the attacker's authorization to modify the targeted user. Consequently, an authenticated user with Provider-level privileges can inject an arbitrary externalId value to assume control over any WordPress account, including administrators. The vulnerability is classified under CWE-639 (Authorization Bypass Through User-Controlled Key) and carries a CVSS 3.1 score of 8.8, indicating high severity.
Potential Impact
Successful exploitation allows an authenticated attacker with Provider-level access to escalate privileges and take over any WordPress user account, including administrators. This can lead to full site compromise, including data theft, site defacement, or further malicious activity. The vulnerability affects all plugin versions up to and including 2.1.3.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are currently available. Until a patch is released, restrict Provider-level user access where possible and monitor for suspicious activity. Avoid granting Provider-level privileges to untrusted users. Follow the vendor's advisory for updates on remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-04-03T06:28:11.890Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d4af3baaed68159af4f58a
Added to database: 4/7/2026, 7:16:11 AM
Last enriched: 4/14/2026, 1:48:03 PM
Last updated: 5/21/2026, 10:46:14 PM
Views: 82
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