The Lab Universe
Hands-on exercises across every class of vulnerability. Read the brief, work it against your own target, and submit the flag. Points and your level are yours the moment you solve one — join the Academy to start tracking them.
3
labsDifficulty
Category
ExpertRace condition
Applying two coupons in the same instant
Slip through the window between a check and the action it guards.
50 pts · 90 minStart →
ExpertRace condition
Beating a rate limit with concurrency
Slip through the window between a check and the action it guards.
50 pts · 90 minStart →
ExpertRace condition
Withdrawing a balance in parallel
Slip through the window between a check and the action it guards.
50 pts · 90 minStart →