CVE-2025-30359
webpack-dev-server users' source code may be stolen when they access a malicious web site
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webpack-dev-server users' source code may be stolen when they access a malicious web site
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 they access a malicious web site. Because the request for classic script by a script tag is not subject to same origin policy, an attacker can inject a malicious script in their site and run the script. Note that the attacker has to know the port and the output entrypoint script path. Combined with prototype pollution, the attacker can get a reference to the webpack runtime variables. By using `Function::toString` against the values in `__webpack_modules__`, the attacker can get the source code. Version 5.2.1 contains a patch for the issue.
Reserved 2025-03-21 | Published 2025-06-03 | Updated 2025-06-03 | Assigner GitHub_MCWE-749: Exposed Dangerous Method or Function
github.com/...server/security/advisories/GHSA-4v9v-hfq4-rm2v
github.com/...ommit/d2575ad8dfed9207ed810b5ea0ccf465115a2239
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