Industry Profile
A major European e-commerce platform enabling third-party sellers, customer orders, and financial transactions through web and mobile channels.
Vulnerability Analysis
- SQL Injection Entry Point: Legacy login embedded user input directly into SQL queries without validation.
- Logic Flaw in Transaction Flow: Refunds were triggered prior to delivery sync due to timing mismatches.
- API Weaknesses: Absence of verification, rate limits, and filtering exposed internal systems and enabled fake listings.
Mitigation Strategy
- Replaced raw SQL with parameterized queries and ORM standards
- Added delivery status locks and abuse detection within workflows
- Hardened APIs using OAuth2, schema validation, and authentication layers
Strategic Takeaways
- Security must evolve with business logic—traditional scans aren't enough
- APIs need robust access control and layered defenses
- Manual testing reveals business-level exploits missed by automation
- Proactive security embedded into dev workflows saves time and cost
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