react-scripts uses webpack-dev-server version 4.6.0 this contains a vulnerability CVE-2025-30360

This has been addressed in webpack-dev-server 5.2.1 and up. I suggest upgrading the dependency on webpack-dev-server to ^5.2.1 or preferably the latest 5.2.2 to address.

Details

webpack-dev-server allows users to use webpack with a development server that provides live reloading. Prior to version 5.2.1, webpack-dev-server users' source code may be stolen when you access a malicious web site with non-Chromium based browser. The Origin header is checked to prevent Cross-site WebSocket hijacking from happening, which was reported by CVE-2018-14732. But webpack-dev-server always allows IP address Origin headers. This allows websites that are served on IP addresses to connect WebSocket. An attacker can obtain source code via a method similar to that used to exploit CVE-2018-14732. Version 5.2.1 contains a patch for the issue.