🔐 CVE-2025-55182 (React2Shell) Educational Demonstration

Interactive comparison of vulnerable vs secure deserialization

This demonstrates the type of vulnerability that affected React Server Components - CVSS 10.0/10.0 (Maximum Severity)

⚠️ Educational Purpose Only: This page contains simulated vulnerabilities for learning. Never implement vulnerable code in production systems!

Vulnerable Implementation

Insecure

❌ The Problem: Insecure Deserialization

Server blindly trusts and executes user input without validation

📡 HTTP Request Preview
Click a button above to see the HTTP request
Response will appear here after sending request

🔴 Why This Is Dangerous:

  • Uses eval() on user input
  • No validation or sanitization
  • Attacker can execute ANY code
  • Similar to CVE-2025-55182 concept

Secure Implementation

Protected

✅ The Solution: Input Validation & Whitelisting

Server validates all input against strict rules

📡 HTTP Request Preview
Click a button above to see the HTTP request
Response will appear here after sending request

🟢 Security Improvements:

  • Whitelisted operations only
  • Type validation (numbers only)
  • No arbitrary code execution
  • Structured input validation

🔍 HTTP vs HTTPS: Man-in-the-Middle Attack Demonstration

📡 What Does an Attacker See?

When you send data over the network, an attacker performing a Man-in-the-Middle (MITM) attack can intercept the traffic. HTTP sends data in plain text (readable), while HTTPS encrypts the data (unreadable gibberish). Click any button above to see what an attacker would intercept:

🔓 HTTP Traffic (Unencrypted)

⚠️ VULNERABLE: Attacker can read everything in plain text!

Click any button above to see what an attacker would intercept

❌ Attacker sees: passwords, session tokens, personal data, API keys - EVERYTHING!

🔒 HTTPS Traffic (Encrypted)

✅ PROTECTED: Attacker only sees encrypted gibberish!

Same request but encrypted - unreadable to attackers

✅ Attacker cannot read the content - data is encrypted!