CVE-2025-30360 – Webpack-dev-server Cross-site WebSocket Hijacking Vulnerability

CVE ID : CVE-2025-30360

Published : June 3, 2025, 6:15 p.m. | 14 minutes ago

Description : 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.

Severity: 6.5 | MEDIUM

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