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

BleepingComputer

December 4, 2025 at 3:11 PM

Overview

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.

Key Takeaways

Affected Systems: React, Next.js applications using the React Server Components 'Flight' protocol
Action Required: Developers are advised to review their applications for the vulnerability and apply necessary security patches or updates as they become available.
Timeline: Newly disclosed

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

Exploitation Status

The exploitation status is currently unknown. Monitor vendor advisories and security bulletins for updates.

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.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Vulnerability, Critical.

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