Bug Bounty Endpoints Guide for Pentesters

If you're serious about bug bounty hunting or penetration testing, here’s the truth: the most critical vulnerabilities don’t appear randomly… they usually hide inside specific high-risk endpoints 👀
In this guide, you'll learn exactly which endpoints to focus on, what vulnerabilities to look for, and how to test them like a pro.

Login Endpoint (/login) 🔐​

This is the front door of any application - and one of the most targeted attack surfaces.

Common vulnerabilities:​

• Missing rate limiting → enables brute-force attacks
• 2FA bypass (Two-Factor Authentication)
• Credential stuffing attacks

Example:​

POST /login HTTP/1.1
Host: target.com
Content-Type: application/json

{
  "username": "admin",
  "password": "123456"
}

💡 Try sending multiple rapid requests. If there’s no lockout or delay, you may have a valid finding.

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Password Reset Endpoint (/reset-password) 🔄​

Often overlooked, but extremely dangerous. This is a prime target for Account Takeover (ATO).

Common vulnerabilities:​

• Reset token leakage
• Email parameter manipulation
• OTP bypass

Example:​

POST /reset-password
{
  "email": "victim@email.com"
}

⚠️ If you can tamper with the email or reuse tokens, the account could be compromised.

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File Upload Endpoint (/upload) 📤​

Any file upload feature is a potential gateway to Remote Code Execution (RCE) ⚠️

Common vulnerabilities:​

• Content-Type bypass
• Double extensions like: shell.php.jpg
• Execution of malicious files on the server

Example:​

POST /upload
Content-Type: multipart/form-data

💡 Try uploading a web shell and check if it executes.

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API Endpoints (IDOR / BOLA) 👤​

APIs are often goldmines for vulnerabilities 💰

Example endpoint:​

/api/v1/user/1001

Common vulnerabilities:​

• Changing user ID to access other users’ data
• Missing authorization checks

Example:​

GET /api/v1/user/1002
Authorization: Bearer YOUR_TOKEN

🔥 If it returns another user’s data → that’s a clear IDOR (BOLA) vulnerability.

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Search Endpoint (/search?q=) 🔍​

Anywhere user input exists = potential attack surface 💥

Common vulnerabilities:​

• SQL Injection
• NoSQL Injection
• Cross-Site Scripting (XSS)
• Command Injection

Example:​

/search?q=' OR 1=1 --

💡 If the response behaves abnormally, you may have an injection vulnerability.

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File Viewer Endpoint (/view?file=) 🌐​

This is commonly linked to SSRF (Server-Side Request Forgery)

Example:​

/view?file=http://localhost:8080

Risks:​

• Accessing internal services
• Exposing sensitive cloud metadata

🔥 Try: http://169.254.169.254/latest/meta-data/

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Admin Panel (/admin) ⚙️​

Usually hidden… but extremely powerful if accessed 👑

Common vulnerabilities:​

• Broken access control
• Misconfigured roles and permissions

Example:​

GET /admin

💡 Try accessing it without authentication or with low privileges.

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Pro Tip 🧠​

The real difference between beginners and pros in pentesting is mindset:
❌ Beginners test features
✅ Professionals test behavior
Focus on:

• How inputs are handled
• Whether IDs can be manipulated
• If permissions are properly enforced

💡 The most valuable bugs are usually behind the scenes, not visible in the UI.

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Final Thoughts 🚀​

If you want consistent results in bug bounty, focus on these high-impact endpoints:

• /login → authentication flaws
• /reset-password → account takeover
• /upload → remote code execution
• /api → IDOR / BOLA
• /search → injection attacks
• /view → SSRF
• /admin → broken access control

Each one can be a critical entry point if tested correctly.