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.
- Published Jun 3, 2025
- CVSS 6.5 medium
- 0.3% chance of exploitation in the next 30 days (EPSS)
- Public exploit code is available
- A fix is available
Affected software
In the news
- Multiple vulnerabilities in IBM products CERT-FR ·