A Broken Access Control vulnerability has been identified in the patient/appointment scheduling management module. The endpoint responsible for handling client profile modifications allows an authenticated user to alter or manipulate data belonging to other registered users by directly tampering with the contextual object identifier parameters (e.g., client_id, patient_id, or appointment_id) in the request body.
Because the backend server-side implementation lacks proper logical verification to validate whether the current active authenticated user owns the resource being updated, this exposes the application to horizontal privilege escalation (IDOR).
Vulnerability Category:
CWE-639: Authorization Bypass Through User-Controlled Key
CWE-284: Improper Access Control
Observed Behavioral Flow (Abstract Context):
A regular authenticated client initiates an update operation regarding their profile/scheduling configurations.
The browser generates a standard structured backend request containing parameters such as:
JSON
{
"id": "[target_resource_id]",
"name": "Updated Name",
"email": "user@example.com"
}
By intercepting this sequence and altering the object reference id to another arbitrary integer value belonging to a different system user, the system updates the remote record without cross-checking structural ownership parameters.
Impact:
An attacker with basic authenticated privileges could systematically enumerate parameter keys to modify, overwrite, or access data belonging to other patients, leading to unauthorized state modifications and integrity issues within the database rows.
Suggested Remediation (Fix):
Implement explicit server-side authorization controls on the handling controller layer. Before executing any database manipulation queries (UPDATE / DELETE / SELECT), the application must dynamically cross-check the session context against the database ownership record using an access control abstraction layer:
PHP
// Conceptual Safe Architecture
$current_authenticated_user_id = Auth::user()->id;
$resource_owner_id = Database::getResourceOwner($target_id);
if ($current_authenticated_user_id !== $resource_owner_id) {
return Response::json(['error' => 'Unauthorized Access Control Violation'], 403);
}
// Proceed with execution if validation passes
A Broken Access Control vulnerability has been identified in the patient/appointment scheduling management module. The endpoint responsible for handling client profile modifications allows an authenticated user to alter or manipulate data belonging to other registered users by directly tampering with the contextual object identifier parameters (e.g., client_id, patient_id, or appointment_id) in the request body.
Because the backend server-side implementation lacks proper logical verification to validate whether the current active authenticated user owns the resource being updated, this exposes the application to horizontal privilege escalation (IDOR).
Vulnerability Category:
Observed Behavioral Flow (Abstract Context):
Impact:
An attacker with basic authenticated privileges could systematically enumerate parameter keys to modify, overwrite, or access data belonging to other patients, leading to unauthorized state modifications and integrity issues within the database rows.
Suggested Remediation (Fix):
Implement explicit server-side authorization controls on the handling controller layer. Before executing any database manipulation queries (UPDATE / DELETE / SELECT), the application must dynamically cross-check the session context against the database ownership record using an access control abstraction layer:
PHP
// Conceptual Safe Architecture
$current_authenticated_user_id = Auth::user()->id;
$resource_owner_id = Database::getResourceOwner($target_id);
if ($current_authenticated_user_id !== $resource_owner_id) {
return Response::json(['error' => 'Unauthorized Access Control Violation'], 403);
}
// Proceed with execution if validation passes