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Owasp Security
top10_2025
A06:2025 - Insecure Design
Security flaws rooted in architecture and planning rather than implementation.
Intent & Description
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🎯 Intent
Build security into the design phase rather than bolting it on afterwards.
📋 Context
Insecure design represents flaws that cannot be fixed by perfect implementation alone. They stem from missing or ineffective security controls during the architecture and design phases.
💡 Solution
Use threat modeling. Integrate security requirements early. Apply secure design patterns. Write unit and integration tests for critical flows. Implement defense in depth at the architecture level.'
Real-world Use Case
Use during system architecture and design phases to prevent fundamental security weaknesses.
Source
📌 TL;DR
Design security in from the start. Use threat modeling, secure design patterns, and defense in depth.
Advantages
- Prevents entire classes of vulnerabilities
- Reduces cost of security fixes
- Enables proactive security posture
- Aligns with secure SDLC practices
Disadvantages
- Requires security expertise during design
- May slow initial development
- Difficult to retrofit into existing systems