All casesPayment System Pentest for Fintech Startup
Finance2025-11

Payment System Pentest for Fintech Startup

Fintech startup processing $10M+ monthly transactions across 15 countries.

47
vulnerabilities
8
critical
3 weeks
Timeframe

Challenge

Preparing for PCI DSS audit. Needed to identify and fix all critical vulnerabilities before auditors arrived.

Solution

Conducted comprehensive pentest of web application, API, and infrastructure. Discovered critical vulnerability in payment authorization allowing transaction amount modification after confirmation.

Results

  • Found 47 vulnerabilities, 8 critical
  • All critical issues fixed in 5 days
  • Successfully passed PCI DSS audit
  • Saved ~$500K in potential fines

Services

pentest-webpentest-apisource-code-review

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