CVE-2025-30360

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 you access a malicious web site with non-Chromium based browser. The `Origin` header is checked to prevent Cross-site WebSocket hijacking from happening, which was reported by CVE-2018-14732. But webpack-dev-server always allows IP address `Origin` headers. This allows websites that are served on IP addresses to connect WebSocket. An attacker can obtain source code via a method similar to that used to exploit CVE-2018-14732. Version 5.2.1 contains a patch for the issue.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/webpack/webpack-dev-server/blob/55220a800ba4e30dbde2d98785ecf4c80b32f711/lib/Server.js#L3113-L3127	Product
https://github.com/webpack/webpack-dev-server/commit/5c9378bb01276357d7af208a0856ca2163db188e	Patch
https://github.com/webpack/webpack-dev-server/commit/72efaab83381a0e1c4914adf401cbd210b7de7eb	Patch
https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-9jgg-88mc-972h	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:webpack.js:webpack-dev-server:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2025-06-03 18:15

Updated : 2025-11-21 18:26

NVD link : CVE-2025-30360

Mitre link : CVE-2025-30360

CVE.ORG link : CVE-2025-30360

JSON object : View

Products Affected

webpack.js

webpack-dev-server

CWE

CWE-346

Origin Validation Error

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