Lab 31 — PayStream — IDOR in GraphQL Billing API

hackadvisor

Task: Multi-tenant SaaS billing platform with GraphQL API for invoice management. Solution: Exploited IDOR in InvoiceDetails query to access other tenants' invoices and retrieve flag from hidden internalNotes field.

graphql idor api broken_access_control multi_tenant billing saas

idor_exploitationgraphql_introspectiontenant_isolation_bypasshidden_field_discovery

$ ls tags/ techniques/

graphql idor api broken_access_control multi_tenant billing saas

idor_exploitationgraphql_introspectiontenant_isolation_bypasshidden_field_discovery

Analysis

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

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