Critical React, Next.js flaw lets hackers execute code on servers

BleepingComputer

December 4, 2025 at 3:11 PM

Summary

The article discusses a critical vulnerability known as 'React2Shell' in the React Server Components (RSC) 'Flight' protocol, which allows remote code execution without authentication in React and Next.js applications. This severe flaw poses significant risks to developers and organizations using these frameworks, as it could lead to unauthorized access and control over servers.

Original Article Summary

A maximum severity vulnerability, dubbed 'React2Shell', in the React Server Components (RSC) 'Flight' protocol allows remote code execution without authentication in React and Next.js applications. [...]

Impact

React, Next.js applications using the React Server Components 'Flight' protocol

In the Wild

Unknown

Timeline

Newly disclosed

Remediation

Developers are advised to review their applications for the vulnerability and apply necessary security patches or updates as they become available. Regular security audits and code reviews are recommended.

Read Original Article

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