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When I start looking at a target in finance, medical, etc, I always go for the most valuable data. In this case, on a major application we'll call "Redacted Corp," that meant file uploads. Invoices, personal documents, signatures... all the PII. Part...

There’s something deeply satisfying about breaking things that are supposed to be “hard limits.” Especially when those limits are the foundation of a SaaS business model. During a recent penetration test, I discovered a critical race condition in a p...
