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Web Application Security

How web applications actually break, and how to stop yours breaking the same way. Every attack is paired with its defence, and every attack is run against something genuinely vulnerable rather than described.

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1 chapter4 lessons1 practice quiz1 hands-on lababout 8h
Start the courseA Query Built From Pieces
01

SQL Injection

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The bug that comes from building a query out of string pieces. Where it comes from, what it lets somebody do, and the one-line habit that ends it.

  1. A Query Built From Pieces1 min
  2. What Injection Is2 min
  3. Break It Yourself3 min
  4. The One-Line Fix3 min
  5. Practice quiz6 questions

Labs

Hands-on challenges for this course. Each one hides a flag you have to find.

  1. The Honest Mistakedifficulty 2