Lab 217 — PlanForge — Broken Authorization in Subscription Upgrade

hackadvisor

Task: SaaS platform with subscription tiers (Free/Pro/Enterprise), billing API exposes plan data. Solution: Queried /api/plans endpoint directly, discovered hidden internal plan with is_public:0 containing the flag in description field.

information_disclosure api_security broken_access_control subscription_bypass hidden_plan

api_enumerationjavascript_source_analysishidden_resource_discoveryis_public_filter_bypass

$ ls tags/ techniques/

information_disclosure api_security broken_access_control subscription_bypass hidden_plan

api_enumerationjavascript_source_analysishidden_resource_discoveryis_public_filter_bypass

Analysis

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

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