Penetration Testing for a Fintech Lending Platform
Penetration Testing for a Fintech Lending Platform
From “we already have a working platform” to “we know what must be fixed before business expansion.”
Web App + API + Mobile App → Security Testing → Risk-Based Findings → Developer Fix → Retesting
A fintech lending platform was preparing for business expansion and external stakeholder review. The platform already supported customer onboarding, loan application, user data processing, transaction activities, and operational dashboards. Management wanted independent validation before moving further.
Sensitive customer data exposure risk
API abuse possibility
Business logic weakness
Go-live / stakeholder review pressure
- Weaknesses in authorization logic
- API endpoints exposing more data than necessary
- Session and token handling issues
- Inconsistent input validation
- Sensitive information visible in certain responses
- Business logic flows that could be abused
- Security configuration issues
Confirmed application scope across web, mobile, API, user roles, and critical business flows.
Performed black-box and grey-box penetration testing across the platform.
Validated vulnerabilities with proof-of-concept documentation and business impact explanation.
Grouped findings by criticality and business risk, not only technical severity.
Performed retesting after remediation to confirm key vulnerabilities were closed.
Figures are anonymized and may be adjusted based on final approved project data.
- Management was unsure which security issues mattered most
- Developers had no external validation
- Business logic risks were not clearly understood
- Security readiness before expansion was uncertain
- Findings were grouped by business risk
- Development team received clear remediation priorities
- Management understood go-live/security implications
- Retesting confirmed remediation progress
Capio helped the client move from uncertainty to a clear security decision: what can proceed, what must be fixed first, and what can be improved over time.