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GraphQL-Scripts

This repository contains a series of useful scripts for pentesting GraphQL endpoints.

Basic Information

This repository contains two scripts: qGen.py and effuzz.py.

  • qGen.py allows you to list all the methods available in your GraphQL schema and then generate a query to dump all possible information with a method (like findAllUsers).
  • effuzz.py allows you to check permissions in all the methods of your GraphQL schema (similar output to ffuf).

Methodology to use

Important

You must have previously obtained the result of an introspection query and save it to a json file like introspection_schema.json

  • You can first run effuzz.py to check for interesting methods allowed for your session:
python3 effuzz.py --introspection /path/to/introspection_schema.json --url https://example.com/graphql

[redacted]
getAllTests    [Status: 401] [Size: 32] [Words: 5] [Lines: 1]
getAllUsers    [Status: 400] [Size: 261] [Words: 25] [Lines: 1] #<----- This indicates a malformed query, so you have permissions for this one
getAllConfigs   [Status: 200] [Size: 48] [Words: 15] [Lines: 1] #<----- You also have permissions for this one
  • Once you obtained those methods which might interest you, you can run qGen.py and generate a query for that method:
python3 qGen.py --introspection /path/to/introspection_schema.json

[redacted]
qGen $ use getAllUsers
qGen $ genQuery
  • Now you can copy the query generated and paste it into BurpSuite, PostMan or GraphiQL.