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.
A negative quantity at checkout
Use the feature exactly as built, in an order it never anticipated.
A price that travels in the request
Use the feature exactly as built, in an order it never anticipated.
Applying the same coupon twice
Use the feature exactly as built, in an order it never anticipated.
Voting more than once by replaying the request
Use the feature exactly as built, in an order it never anticipated.
Referral rewards that pay you to invite yourself
Use the feature exactly as built, in an order it never anticipated.
Skipping the payment step of the order
Use the feature exactly as built, in an order it never anticipated.
Upgrading a plan without paying the difference
Use the feature exactly as built, in an order it never anticipated.
Assembling a discount no single rule forbids
Use the feature exactly as built, in an order it never anticipated.
Refunding more than you paid
Use the feature exactly as built, in an order it never anticipated.