How I Found a $750 Vulnerability by Thinking Like a Business User
Last month, while testing an e-commerce platform, I discovered a logic flaw that allowed attackers to manipulate pricing algorithms — not through technical exploits, but by understanding business workflows better than the developers did. The company paid a $750 bounty after I demonstrated how this could bankrupt their flash sale system. Here’s how you can spot these invisible vulnerabilities.
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Unlike SQLi or XSS, logic flaws:
- Don’t break systems — They use them “as intended”
- Exploit workflow gaps — Between how developers think vs. how users behave
- Are protocol-compliant — No WAF triggers or error messages
Real-World Impact:
A 2024 Shopify report found logic flaws account for 42% of high-impact financial bugs in e-commerce.