Critical Unauthenticated RCE Vulnerability Reported in React Ecosystem (CVE-2025-55182)

On December 3, 2025, reports emerged describing a critical remote code execution vulnerability (CVE-2025-55182, dubbed "React2Shell") affecting the React ecosystem through the Flight protocol logic. According to unverified sources, this unauthenticated RCE vulnerability primarily impacts Next.js and downstream frameworks like Vite, potentially affecting approximately 80% of major websites. A simple curl test (response code 500 indicating vulnerability, 400 indicating security) is reported as a detection method. However, as the original article could not be accessed for verification, these details remain unconfirmed. If accurate, this vulnerability would represent an extremely severe threat requiring immediate attention. The cybersecurity community should monitor official sources for confirmation and mitigation guidance. Without verified details, specific technical analysis cannot be provided, but the reported characteristics suggest this could become a major exploitation target if confirmed.