pii
Intermediate level
2Account enumeration via LinkedIn + phone — exposure of millions of users
Real case: API account enumeration combined with LinkedIn scraping + reverse phone lookups to correlate real identities with private accounts. Critical privacy impact.
URL shortener as a mass PII leak — extraction of ~300 people/hour
Low-entropy codes + no rate limiting + a ticket with no auth = enumeration of phone numbers, cards (BIN+last 4) and real customers' purchases.
Advanced level
1Practice pii with real labs
Apply the techniques in safe environments based on real bug bounty reports.
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labs from real hacks
completions
paid out for these bugs
The checklist I run on every new target
47 checks ordered by cost: first what can get you in trouble, then the cheap stuff, and finally the expensive stuff — which is where the big bounties are. I'll send it to your inbox right now.
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