Exploitation

Building on earlier PeerBlight attacks, Google Threat Intelligence reports exploitation of the React2Shell vulnerability (CVE-2025-55182) by China-nexus clusters and financially motivated actors deploying backdoors and cryptocurrency miners on vulnerable React and Next.js systems.

December 10, 2025 Reported by AI

A critical vulnerability in React Server Components, known as React2Shell and tracked as CVE-2025-55182, is being actively exploited to deploy a new Linux backdoor called PeerBlight. This malware turns compromised servers into covert proxy and command-and-control nodes. Attackers use a single crafted HTTP request to execute arbitrary code on vulnerable Next.js and React applications.