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 webhook tester pointed at localhost
Make the server fetch a URL of your choosing, from inside its network.
An image importer aimed inward
Make the server fetch a URL of your choosing, from inside its network.
The link-preview that fetches anything
Make the server fetch a URL of your choosing, from inside its network.
Blind SSRF confirmed out of band
Make the server fetch a URL of your choosing, from inside its network.
Bypassing an allowlist with a DNS trick
Make the server fetch a URL of your choosing, from inside its network.
Reaching the cloud metadata endpoint
Make the server fetch a URL of your choosing, from inside its network.
Gopher-smuggling a request to an internal service
Make the server fetch a URL of your choosing, from inside its network.
Redirect-hopping into a private range
Make the server fetch a URL of your choosing, from inside its network.