Bypassing a Coupon’s usage_limit via a Race Condition in an E-Commerce Platform
TL;DR: A Ruby on Rails e-commerce platform enforces a promotion’s redemption limit (e.g. a single-use coupon) by counting the completed… Continue reading on Medium »
🎯 Vulnerability: Remote Code Execution (RCE)
💡 Defense Fix: Avoid executing shell commands via system(). Use parameterized APIs and strict input sanitization.