access-control-audit

Auditing API endpoints for broken access control involves reviewing server-side authorization logic to detect missing checks, insecure direct object references (IDOR), and privilege escalation flaws. This process identifies gaps where unauthorized users might access sensitive data.

Preventing IDOR requires implementing server-side resource ownership verification for each API request. Instead of relying on client-side references, the server must explicitly validate that the requesting user is authorized to access the specific resource ID requested.

Attribute-Based Access Control (ABAC) secures API endpoints by evaluating user attributes, resource properties, and environmental conditions before granting access. This dynamic authorization model prevents privilege escalation by enforcing granular, policy-driven restrictions on server-side resource management.

Missing authorization checks create OWASP A05 vulnerabilities by allowing authenticated users to access resources or execute actions outside their intended permissions. Without server-side middleware enforcing access policies, attackers can manipulate requests to view sensitive data or escalate privileges.

Yes, you can fix broken access control flaws on existing API routes by integrating robust authorization middleware. This middleware intercepts incoming requests to verify user permissions and resource ownership before the request reaches the endpoint logic, closing security gaps.

Relying on client-side data for access control is limited because attackers can easily manipulate client-side state. Secure implementation requires server-side security checks, as client-side controls are bypassable and cannot be trusted to prevent unauthorized data access or privilege escalation.