CVE-2025-30360

Name of the Vulnerable Software and Affected Versions webpack-dev-server versions prior to 5.2.1

Description The issue allows an attacker to obtain source code via a method similar to that used to exploit a previously reported vulnerability. This is possible because webpack-dev-server always allows IP address Origin headers, enabling websites served on IP addresses to connect via WebSocket. The Origin header is checked to prevent Cross-site WebSocket hijacking.

Recommendations For versions prior to 5.2.1, update to version 5.2.1 or later to resolve the issue. As a temporary workaround, consider restricting access to the WebSocket connection to prevent potential exploitation.