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CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 2

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. Se ha descubierto un problema en lib/Server.js en webpack-dev-server en versiones anteriores a la 3.1.6. Los atacantes pueden robar el código del desarrollador porque el origen de las peticiones no es comprobado por el servidor WebSocket, utilizado para HMR (Hot Module Replacement). • https://blog.cal1.cn/post/Sniffing%20Codes%20in%20Hot%20Module%20Reloading%20Messages https://github.com/webpack/webpack-dev-server/commit/f18e5adf123221a1015be63e1ca2491ca45b8d10 https://github.com/webpack/webpack-dev-server/issues/1445 • CWE-20: Improper Input Validation •