CVE-2025-30359 (GCVE-0-2025-30359)

Vulnerability from cvelistv5 – Published: 2025-06-03 17:39 – Updated: 2025-06-03 17:50
VLAI
Title
webpack-dev-server users' source code may be stolen when they access a malicious web site
Summary
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-06-03 17:49 UTC
CWE
  • CWE-749 - Exposed Dangerous Method or Function
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7814 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
webpack webpack-dev-server Affected: < 5.2.1
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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