Saturday, October 31, 2026

Prompt Injection Lab: Make a Sales Bot Leak Its Secret

RetailBot has one rule: never reveal the staff discount code. It is written right there in its system prompt, in capital letters. And it still hands the code over to anyone who asks the right way. This is prompt injection in its simplest form, and it is the first lab I point every beginner to, because once you see how little it takes, you stop trusting system prompts as a security control. Lab at a glance: Beginner · 80 XP…

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