Medium severity · published Jun 3, 2025
CVE-2025-30360
webpack-dev-server allows users to use webpack with a development server that provides live reloading
6.5
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
Webpack-dev-server · Webpack.js
before 5.2.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-30360
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-30360
Product
https://github.com/webpack/webpack-dev-server/blob/55220a800ba4e30dbde2d98785ecf4c80b32f711/lib/Server.js#L3113-L3127
Patch
https://github.com/webpack/webpack-dev-server/commit/5c9378bb01276357d7af208a0856ca2163db188e
Patch
https://github.com/webpack/webpack-dev-server/commit/72efaab83381a0e1c4914adf401cbd210b7de7eb
Exploit
https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-9jgg-88mc-972h
More from Webpack-dev-server
7.5
CVE-2018-14732
An issue was discovered in lib/Server.js in webpack-dev-server before 3.1.6
6.5
CVE-2026-6402
webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins
5.9
CVE-2025-30359
webpack-dev-server allows users to use webpack with a development server that provides live reloading
5.3
CVE-2026-14631
webpack-dev-server vulnerable to denial of service via a malformed Host or Origin header
4.7
CVE-2026-14620
webpack-dev-server vulnerable to cross-site request forgery via internal developer endpoints