Fintech API Security: The Attack Surfaces Nobody Talks About

Tue, 12 Aug 2025 00:00:00 +0000

Working in fintech security — both building payment infrastructure at Durrafx and testing external platforms through bug bounty — has given me a particular view of how fintech APIs fail. The standard OWASP Top 10 checklist catches the obvious stuff. This post is about what comes after that.

Why Fintech APIs Are Different Link to heading

A generic web app leaking user data is bad. A payment API leaking transaction data, processing unauthorized disbursements, or allowing account takeover is directly money-out-the-door bad. The stakes mean that subtle logic flaws — the kind that don’t trigger a WAF, don’t show up in automated scans, and require understanding the business model — are often the most valuable findings.

SQL Injection from Zero to Shell: A Practical Walkthrough

Mon, 10 Feb 2025 00:00:00 +0000

SQL injection is one of the oldest and most consistently exploited vulnerability classes on the web. It’s been in the OWASP Top 10 since 2003. It keeps showing up in real engagements, bug bounty reports, and CTF challenges year after year.

This post walks through SQL injection end-to-end — detection, manual exploitation, data extraction, and in some cases, a path to remote code execution.

How It Works Link to heading

When a web application constructs a SQL query by directly embedding user input, an attacker can manipulate that query’s logic.

Web Security on Njeru Mtwaiti

Fintech API Security: The Attack Surfaces Nobody Talks About

Why Fintech APIs Are Different Link to heading

SQL Injection from Zero to Shell: A Practical Walkthrough

How It Works Link to heading