Working with JWTs
As more sites provide client API access, JWTs are commonly used for authentication. These tokens hold identity and claim information tied to the resources the user is granted access to on the target site. Web-penetration testers need to read these tokens and determine their strength. Fortunately, there are some handy plugins that make working with JWTs inside Burp Suite much easier. We will learn about these plugins in this recipe.
Getting ready
Log in to your PortSwigger account. We will be using Lab: JWT authentication bypass via flawed signature verification (https://portswigger.net/web-security/jwt/lab-jwt-authentication-bypass-via-flawed-signature-verification) and the JWT Editor extension to exploit a signature vulnerability in our target application.
How to do it...
- Switch to Burp Suite Extensions | BApp Store and install the JWT Editor plugin:
Figure 11.7 – The JWT Editor extension
- After you install...
