🎯 Attack Vector

• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: None
• User Interaction: None
• Scope: Changed

An attacker can send a specially crafted request to a vulnerable React Server endpoint, triggering prototype pollution and achieving remote code execution.

💥 Impact

Successful exploitation of CVE-2025-55182 may allow an attacker to:

• Execute arbitrary system commands
• Compromise the application server
• Access sensitive environment variables
• Steal secrets or credentials
• Perform lateral movement within the infrastructure
• Fully take over the affected application

This vulnerability represents a complete server compromise risk.

🧪 Proof of Concept (PoC)

A complete proof-of-concept demonstrates exploitation of CVE-2025-55182 in a controlled environment.

High-level PoC description:

• Send a crafted request containing malicious prototype keys
• Trigger prototype chain pollution in React Server processing
• Achieve execution of attacker-controlled code on the server

⚠️ The PoC is intended only for local testing and lab environments.

🛡 Mitigation & Remediation

• Upgrade immediately once a patched version is released.
• Avoid using vulnerable versions of react-server-dom-webpack.
• Strictly validate and sanitize all user-controlled input.
• Prevent prototype pollution by:
  • Disallowing __proto__, constructor, and prototype keys
  • Using safe object creation patterns
• Implement runtime protections such as:
  • Object freezing
  • Deep input validation
  • Security monitoring and logging

📚 References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-55182
• React Security Advisories (when published)
• CWE-1321: Prototype Pollution

🔒 Responsible Disclosure

This document does not contain weaponized exploit code.
It is shared to raise awareness and help developers and security teams understand and remediate the issue responsibly.

📜 License

MIT License