Attackers Don’t Break In, They Log In
Most attackers are on your apps as legitimate users. Firewalls and scanners won’t catch them and they are there looking to exploit weaknesses in your business logic.
Rozolo is a completely free, deliberately vulnerable app training environment, built by our team of AppSec experts. It provides a safe environment where teams can experiment with vulnerable API and business logic, see how attacks unfold, and build the skills to prevent them.
How can you use Rozolo?
Rozolo covers a wide range of common logic flaws, including:
Misused functionality
Improper access controls
Broken Object Level Authorization (BOLA)
Data exposure
Scenarios can be tailored to reflect your industry and typical challenges.
Your team can walk through realistic attacks, see how small design oversights become exploitable behaviours, and learn how to avoid the same weaknesses in real services.
Why We Built Rozolo
We built Rozolo as a free platform to help our community strengthen its understanding of API security without barriers or commercial commitments.
It is designed to make security more accessible, giving teams a space to practise, test ideas and build confidence.
When engineers see how logic fails in the wild, they design safer systems from the start.
How the Rozolo training environment can support your team
Strengthen design practices early
Explore how your logic responds under realistic conditions and spot weak points before they become incidents.
Go beyond perimeter security
Understand vulnerabilities that traditional network tools won’t flag, especially those hidden inside business logic.
Support secure engineering culture
Help developers, architects and analysts see the implications of design choices and build confidence in creating secure API flows.
Relevant for every sector
Whether you’re in finance, retail or the public sector, the underlying lessons apply across modern digital services.
Completely free. No obligation.
A safe, hands-on learning environment with zero cost and no commitments.
See Rozolo in action
If you’d like to learn how Rozolo can help your team explore API logic and security in a practical, hands-on way, get in touch and we’ll share more details.
