🔐 The Hidden Art of Testing Authorization — Where Most Critical Bugs Exist
Most bug bounty hunters focus on:
- XSS - SQL Injection - Payloads
But the reality is:
👉 Most high-impact bugs today come from broken authorization
And the worst part?
👉 They are often simple to find.
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🧠 What is Authorization (Simple)
Authorization means:
👉 "Who is allowed to access what?"
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💡 Example:
- User A → can see their profile - User B → should NOT see User A's data
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👉 If this breaks:
💥 Vulnerability
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🔥 Why Authorization Bugs Are Powerful
Because they lead to:
- Data leaks - Account takeover - Privilege escalation
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👉 These are high bounty bugs
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🔍 Where to Look (Important)
Focus on:
- APIs - Admin panels - User data endpoints - Payment systems
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💡 Example Endpoint:
GET /api/user?id=1001
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⚡ Step-by-Step Testing
🧠 Step 1: Identify the Resource
Ask:
- What data is being accessed? - Who owns it?
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🔄 Step 2: Change Identifier
?id=1001 → ?id=1002
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👉 Check:
- Do you get another user's data?
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💥 If yes → IDOR
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🔐 Step 3: Test Without Login
- Logout - Replay request
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👉 If still works:
💣 Missing authentication
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🔄 Step 4: Test Role-Based Access
"role": "user" → "admin"
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👉 Check:
- Can you access admin features?
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💣 Real Scenario
Feature: 👉 Invoice download
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Test:
- Changed invoice ID - Accessed another user's invoice
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👉 Result:
💥 Data exposure
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🧠 Advanced Insight
Modern apps fail when:
👉 Frontend restricts 👉 Backend trusts
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👉 Always test API directly
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❌ Common Mistakes
- Trusting UI restrictions - Not modifying requests - Ignoring APIs
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✅ Pro Tips
- Always test IDs 🔥 - Focus on: - user_id - order_id - invoice_id
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🚀 Action Plan
Today:
1. Open DevTools 2. Find API 3. Change ID 4. Test access
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👉 Simple test, big impact
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🏁 Final Thoughts
Authorization bugs are everywhere.
👉 Most hackers ignore them
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💬 Start testing access, not payloads.
👉 That's where real money is.
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🚀 Think like a hacker — test like a researcher.