vulnerability🌐InternationalCSO Online
React2Shell is the Log4j moment for front end development
Friday, December 19, 2025
What
A maximum severity vulnerability in React Server Components allows attackers to execute arbitrary code on vulnerable servers via unauthenticated HTTP requests, leading to potential ransomware deployment.
Where
Exploits are occurring in enterprise environments globally, particularly affecting organizations using React or React-based applications.
When
The vulnerability was disclosed recently, with initial exploitation observed within hours of public disclosure.
Key Factors
- •CVE-2025-55182 is a pre-authentication remote code execution vulnerability.
- •Attackers can exploit the flaw with a single HTTP request, making it easy to automate attacks.
- •The vulnerability affects the Flight protocol, a core feature in React and Next.js, which fails to validate incoming payloads.
Takeaways
- →Organizations should ensure that React Server Components are fully patched and perform forensic reviews for signs of compromise.
- →This incident underscores the need for enhanced security measures in front-end development, which has often been considered low-risk.
- →Implementing a zero-trust model could mitigate risks associated with such vulnerabilities.
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