Skip to main content

WebGoat + Full Linux Desktop

What is this lab?​

OWASP WebGoat is a deliberately insecure training application for learning web application security in a safe environment. The CSN environment includes a full Linux desktop so you can use a browser, terminal, and optional tools alongside the lessons.

What you will learn​

  • How common web flaws show up in HTTP requests and responses
  • Authentication, access control, and input-handling weaknesses
  • How to validate behavior with a proxy and structured notes
  • Mapping issues to risk categories and reasonable fixes

Prerequisites​

Tools​

  • Web browser with developer tools
  • Web proxy (Burp Suite or OWASP ZAP), optional but recommended

Knowledge​

  • Basic HTTP and web application concepts
  • Familiarity with browser DevTools

Launch the lab​

Open WebGoat in CSN Labs →

Getting started​

  1. Click Start Lab and open the URL shown for your instance.
  2. If you do not see the WebGoat UI, try appending /WebGoat to the lab URL.
  3. Create a user account and sign in (recommended over shared defaults).
  4. Optionally route browser traffic through Burp or ZAP.

How to use this lab​

  • Pick one lesson category and work through lessons in order at first.
  • For each lesson: read the objective, interact with the app, then confirm behavior in your proxy.
  • Write down entry point, parameter, response, and what control should exist.
  • After a category, summarize root cause and remediation in a few sentences.

Suggested lesson themes​

  • Authentication and session — login flows, passwords, sessions
  • Access control — what different users can see or do
  • Injection and input handling — SQLi, XSS, and related patterns
  • Client-side and misconfiguration — CORS, headers, unsafe defaults

WebGoat sometimes includes WebWolf for some exercises; if it is exposed, it is often on a second port (for example 9090).

Scenarios​

Scenario walkthroughs for WebGoat will be added here over time.

Safety and ethics​

Use these techniques only in authorized lab environments. Unauthorized testing against systems you do not own or lack permission to test is illegal and unethical.

References​