Web Reference: 1 day ago · Critical RCE Flaw at the Core The attack exploits CVE-2025-55182, a critical remote code execution (RCE) vulnerability discovered in React Server Components, widely referred to as the React2Shell flaw. The vulnerability exists because serialized client data sent to server endpoints is processed without adequate validation or sanitization. Dec 15, 2025 · To exploit CVE-2025-55182, an attacker sends a crafted input to a web application running React Server Components functions in the form of a POST request. This input is then processed as a serialized object and passed to the backend server, where it is deserialized. Dec 10, 2025 · In this article, you learned about the "React2Shell" vulnerability, how to verify it using the original developer's tools, and how to upgrade your app to secure your Server Components.
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