Lab 198 — PayrollSync — Broken Auth via GraphQL Introspection

hackadvisor

Task: HR/payroll platform with GraphQL API, given employee credentials. Solution: Used GraphQL introspection to discover adminUsers query, exploited missing authorization to steal admin API key, then accessed system config containing the flag.

jwt graphql idor express api_security broken_access_control introspection

authorization_bypassgraphql_schema_enumerationapi_key_theftintrospection_attack

$ ls tags/ techniques/

jwt graphql idor express api_security broken_access_control introspection

authorization_bypassgraphql_schema_enumerationapi_key_theftintrospection_attack

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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