Information Exposure Affecting webpack-dev-server Open this link in a new tab package, versions <3.1.11

  • Exploit Maturity

    Proof of concept

  • Attack Complexity


  • Confidentiality


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  • snyk-id


  • published

    26 Sep 2018

  • disclosed

    24 Jul 2018

  • credit


How to fix?

Upgrade webpack-dev-server to version 3.1.11 or higher.


webpack-dev-server Uses webpack with a development server that provides live reloading. It should be used for development only.

Affected versions of this package are vulnerable to Information Exposure. The origin of requests is not checked by the WebSocket server, which is used for HMR. A malicious user could receive the HMR message sent by the WebSocket server via a ws:// connection from any origin.