TL;DR A coding flaw in PayPal’s loan app went undetected for nearly six months, exposing sensitive customer data — not because prevention controls failed catastrophically, The post What the Recent PayPal Breach Says About Modern Web Risk appeared first on Reflectiz.

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A coding flaw in PayPal's Working Capital loan app went undetected for nearly six months in 2025, exposing sensitive customer data including SSNs. The core issue wasn't a catastrophic prevention failure but a lack of continuous runtime visibility after deployment. Attackers increasingly exploit backend vulnerabilities then pivot to client-side browser-based exfiltration, a layer most security stacks don't monitor. The Magecart attack on Segway is cited as a parallel example. Traditional tools like SAST, code review, and pen testing don't cover live runtime behavior, leaving a detection gap that allows exposure windows to grow. Continuous client-side monitoring is presented as the missing piece in modern web security stacks.

What the Recent PayPal Breach Says About Modern Web Risk

When Backend Breaches Surface Through the Front End

Where Traditional Security Falls Short — and What Fills the Gap