Lab: Low-level logic flaw
Summary: PortSwigger's lab presents a purchasing workflow that does not adequately validate user input, allowing a logic flaw to be exploited so items can be bought at an unintended price. Solving it requires buying a "Lightweight l33t leather jacket" while logged in as wiener:peter, using Burp Intruder or Turbo Intruder with requests sent one at a time so the price increases in predictable increments.
Bottom line: The flaw lives in the business logic of a checkout flow, not in a signature or patch - the kind of defect that lets an attacker name their own price while every scanner rule passes clean.
Read the original at PortSwigger Research ↗
- Topics
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