How a FinTech Company Found 23 Critical Vulnerabilities Before Hackers Did
A payment processing company in Ahmedabad was about to launch a new customer portal. They assumed their developers had handled security. We ran a full VAPT engagement and found 23 critical and high-severity vulnerabilities — any one of them could have exposed customer financial data.
23
Critical/High Findings
100%
Fixed Before Launch
0
Incidents Post-Launch
Client Background
A FinTech company handling digital payments and lending operations for over 50,000 customers. They were 3 weeks away from launching a new self-service portal when their banking partner required a VAPT report.
The Problem
No prior security testing — ever. Developers built features but never tested for vulnerabilities
Banking partner demanded a clean VAPT report before integration approval
The portal handled sensitive financial data: PAN cards, bank accounts, transaction history
They had 3 weeks before the deadline or they'd lose the partnership
What We Did
Conducted full-scope web application penetration testing (OWASP Top 10 methodology)
Tested the API layer separately — found authentication bypass on 4 endpoints
Ran automated vulnerability scanning plus manual exploitation attempts
Delivered prioritised report within 5 days with exact fix instructions for each finding
Technologies Used
OWASP Testing Methodology
Burp Suite Professional
Custom API fuzzing scripts
Network vulnerability scanners
Results
Found 23 critical/high vulnerabilities including SQL injection, broken authentication, and exposed API keys
Development team fixed all issues within 10 days using our remediation guidance
Passed re-verification testing with zero remaining critical findings
Got banking partner approval and launched on time
Zero security incidents in the 8 months since launch
Client Outcome
"We thought our code was secure because it worked. Nonce Systems showed us that working and secure are two very different things. If we'd launched without that test, we would have been breached within weeks. They saved us from a disaster we didn't even know was coming."