The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Authentication Bypass in versions up to, and including, 5.7.2 via the OsCustomerHelper::create_wp_user_for_customer() helper reached from the public process_step_customer() booking step. When the Use WordPress users as customers option is enabled, the helper falls back from email_exists() to username_exists( $customer->email ), which matches any WordPress user whose user_login equals the victim customers email even when that users user_email is completely different, and links that WordPress users ID into the victims LatePoint customer row (only privileged roles are excluded; Subscriber is allowed). This makes it possible for authenticated attackers, with Subscriber-level access and above, to take over another customers LatePoint account — accessing their bookings, service, agent, and calendar data, and having the victim customers email overwritten with the attackers on next login — by holding a Subscriber account whose user_login equals the victims email and submitting an unauthenticated public booking step registration request.
Weakness
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/114.html
- https://cwe.mitre.org/data/definitions/115.html
- https://cwe.mitre.org/data/definitions/151.html
- https://cwe.mitre.org/data/definitions/194.html
- https://cwe.mitre.org/data/definitions/22.html
- https://cwe.mitre.org/data/definitions/57.html
- https://cwe.mitre.org/data/definitions/593.html
- https://cwe.mitre.org/data/definitions/633.html
- https://cwe.mitre.org/data/definitions/650.html
- https://cwe.mitre.org/data/definitions/94.html
References
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.2/latepoint.php#L1072
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.2/lib/helpers/customer_helper.php#L259
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.2/lib/helpers/customer_helper.php#L274
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.2/lib/helpers/steps_helper.php#L2146
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.2/lib/helpers/steps_helper.php#L2156
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.3/lib/helpers/customer_helper.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/2a942d71-7172-4e02-9faa-3a2c1c9e7fbd?source=cve