React’s Worst Vulnerability Ever (RCE Exploit Explained)

Published: 08 December 2025
on channel: Better Stack

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A massive React + Next.js security flaw was just exposed and it’s as bad as it gets. An unauthenticated remote code execution (RCE) vulnerability hit React Server Components, letting attackers run anything on your server with a single request.

🔗 Relevant Links
CVE: https://github.com/advisories/GHSA-fv...
React2Shell: https://react2shell.com/
Original POC: https://github.com/lachlan2k/React2Sh...
Detailed POC: https://github.com/msanft/CVE-2025-55182

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