EUVD-2025-16767
GHSA-4v9v-hfq4-rm2v
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Lifecycle Timeline
5Description
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.
Analysis
A remote code execution vulnerability in webpack-dev-server (CVSS 5.3) that allows users. Risk factors: public PoC available. Vendor patch is available.
Technical Context
Vulnerability type: remote code execution. Affects webpack-dev-server.
Affected Products
['webpack-dev-server']
Remediation
Apply the vendor-supplied patch immediately.
Priority Score
Vendor Status
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External POC / Exploit Code
Leaving vuln.today