MAL-2025-17604 Malicious code in cosmic-dev-server (npm)

The package cosmic-dev-server was found to contain malicious code...

Malicious code in webpack-dev-server (RubyGems)

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MAL-2025-6629 Malicious code in webpack-dev-server (RubyGems)

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Cloudflare Vite plugin exposes secrets over the built-in dev server

Summary Note: originally posted on H1 but closed. Cross-posting over to here in abundance of caution instead of a public issue. When utilising the Cloudflare Vite plugin in its default configuration, all files are exposed by the local dev server, including files in the root directory that contain...

GHSA-4PFG-2MW5-F8JX Cloudflare Vite plugin exposes secrets over the built-in dev server

Summary Note: originally posted on H1 but closed. Cross-posting over to here in abundance of caution instead of a public issue. When utilising the Cloudflare Vite plugin in its default configuration, all files are exposed by the local dev server, including files in the root directory that contain...

PT-2025-38576

Name of the Vulnerable Software and Affected Versions: Cloudflare Vite plugin versions prior to 1.6.0 Description: The Cloudflare Vite plugin, when used with its default configuration, exposes files from the root directory via the local development server. This includes sensitive files such as .e...

Exploit for CVE-2025-30208

🔥 CVE-2025-30208 Vite Arbitrary File Read Vulnerability Scanne...

Cross-site WebSocket Hijacking

webpack-dev-server is vulnerable to Cross-site WebSocket hijacking. The vulnerability is due to improper Origin header validation, which permits IP address origins, allows attackers to hijack WebSocket connections and steal source code via malicious websites...

Exposed Dangerous Method Or Function

webpack-dev-server is vulnerable to source code exposure. The vulnerability is due to lack of proper origin checks due to requests for classic scripts not being subject to the same-origin policy, allowing attackers to inject malicious scripts that extract source code if the port and script path a...

webpack-dev-server users' source code may be stolen when they access a malicious web site with non-Chromium based browser

Summary Source code may be stolen when you access a malicious web site with non-Chromium based browser. Details 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 header...

GHSA-9JGG-88MC-972H webpack-dev-server users' source code may be stolen when they access a malicious web site with non-Chromium based browser

Summary Source code may be stolen when you access a malicious web site with non-Chromium based browser. Details 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 header...

webpack-dev-server users' source code may be stolen when they access a malicious web site

Summary Source code may be stolen when you access a malicious web site. Details Because the request for classic script by a script tag is not subject to same origin policy, an attacker can inject in their site and run the script. Note that the attacker has to know the port and the output entrypoi...

CVE-2025-30360

An information exposure flaw has been discovered in webpack-dev-server. When accessing third party web sites with a non-Chromium based browser, a cross origin request may be allowed. This issue can result in the source code being stolen for users that use a predictable port and a non-Chromium bas...

CVE-2025-30359

An information exposure flaw has been discovered in webpack-dev-server. The request for classic script by a script tag is not subject to the same origin policy, allowing an attacker to inject a malicious script in their site and run the script. The attacker is required to know the port and the...

Exposed Dangerous Method or Function

Overview org.webjars.npm:webpack-dev-server is an Uses webpack with a development server that provides live reloading. It should be used for development only. Affected versions of this package are vulnerable to Exposed Dangerous Method or Function via the webpackmodules object. An attacker can...

CVE-2025-30359

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 they access a malicious web site. Because the request for classic script by a script tag is not subject to same...

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-si...

CVE-2025-30360 webpack-dev-server users' source code may be stolen when they access a malicious web site with non-Chromium based browser

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-si...

CVE-2025-30360

The CVE-2025-30360 entry concerns webpack-dev-server prior to v5.2.1, where an Origin header check for WebSocket connections was insufficient, allowing IP-based origins to access the WebSocket and potentially exfiltrate source code to malicious sites using non-Chromium browsers. The issue is miti...

CVE-2025-30360 webpack-dev-server users' source code may be stolen when they access a malicious web site with non-Chromium based browser

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-si...