Security Hardening for a FinTech Payment Platform
Key outcomes
The Challenge
A rapidly growing Series B FinTech preparing for a major enterprise sales push needed to demonstrate robust security posture to prospective clients and pass their vendor security assessments. A recent internal code review had surfaced several potential vulnerabilities, but the team lacked the expertise to conduct a rigorous independent assessment.
With enterprise deals worth over £5M in the pipeline, the cost of a security incident—or even the perception of inadequate security—was existential.
The Solution
TestDel's security team conducted a comprehensive application security assessment covering OWASP Top 10 vulnerabilities, authentication and authorisation logic, API security, and data handling practices. We performed both automated SAST analysis of the codebase and manual penetration testing of the live staging environment.
We identified eleven vulnerabilities, including two critical issues related to JWT token validation and an insecure direct object reference vulnerability in the payments API. We provided detailed remediation guidance and conducted a full retest following fixes to confirm resolution.
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