Webpack.js Webpack webpack-dev-server

An issue was discovered in lib/Server.js in webpack-dev-server before 3.1.6. Attackers are able to steal developer's code because the origin of requests is not checked by the WebSocket server, which is used for HMR (Hot Module Replacement). Anyone can receive the HMR message sent by the WebSocket server via a ws://127.0.0.1:8080/ connection from any origin.

webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins

webpack-dev-server users' source code may be stolen when they access a malicious web site with non-Chromium based browser

webpack-dev-server users' source code may be stolen when they access a malicious web site

webpack-dev-server vulnerable to denial of service via a malformed Host or Origin header

webpack-dev-server vulnerable to HMR WebSocket interception via permissive user proxies

webpack-dev-server vulnerable to cross-site request forgery via internal developer endpoints