Lab 294 — TeamForge — GraphQL Self-Escalation via UpdateMembership

hackadvisor

Task: SaaS workspace platform with GraphQL API; given member account with manage_members permission. Solution: GraphQL introspection revealed updateMembership mutation that lacks self-modification check — escalated own membership to full_admin, then queried adminSecrets for the flag.

jwt graphql privilege_escalation broken_access_control rbac saas self_escalation

broken_access_controlgraphql_introspectionauthorization_bypassself_privilege_escalation

$ ls tags/ techniques/

jwt graphql privilege_escalation broken_access_control rbac saas self_escalation

broken_access_controlgraphql_introspectionauthorization_bypassself_privilege_escalation

Analysis

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

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