Privilege escalation SDLC practices combine proactive threat modeling with strict access control reviews at every stage. Code reviews must flag unsafe calls to authentication and authorization logic. Static analysis should target insecure role checks and weak permission boundaries. Threat modeling should account for both vertical escalation (gaining higher privileges) and horizontal escalation (accessing peer data or functions).
Integrating privilege escalation prevention into the SDLC means building security gates into requirements, design, development, testing, and deployment. During requirements, define exact privilege levels and enforce “least privilege” as a baseline. In design, document privilege flows and how they map to real roles in the system. In development, commit code only after confirming access layers cannot be bypassed. In testing, simulate attacks to verify that privilege boundaries hold under stress. In deployment, monitor logs for unusual privilege change events.
Common flaws include missing authorization checks in APIs, misconfigured identity providers, and orphaned admin accounts in production. Continuous integration pipelines should run automated tests for privilege escalation vectors, while manual penetration testing should check business logic abuse.