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4 vulnerabilities found for webpack-dev-server by webpack
CVE-2025-30360 (GCVE-0-2025-30360)
Vulnerability from cvelistv5 – Published: 2025-06-03 17:41 – Updated: 2025-06-03 17:58
VLAI
Title
webpack-dev-server users' source code may be stolen when they access a malicious web site with non-Chromium based browser
Summary
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)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-346 - Origin Validation Error
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/webpack/webpack-dev-server/sec… | x_refsource_CONFIRM |
| https://github.com/webpack/webpack-dev-server/com… | x_refsource_MISC |
| https://github.com/webpack/webpack-dev-server/com… | x_refsource_MISC |
| https://github.com/webpack/webpack-dev-server/blo… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| webpack | webpack-dev-server |
Affected:
< 5.2.1
|
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CVE-2025-30359 (GCVE-0-2025-30359)
Vulnerability from cvelistv5 – Published: 2025-06-03 17:39 – Updated: 2025-06-03 17:50
VLAI
Title
webpack-dev-server users' source code may be stolen when they access a malicious web site
Summary
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 origin policy, an attacker can inject a malicious script in their site and run the script. Note that the attacker has to know the port and the output entrypoint script path. Combined with prototype pollution, the attacker can get a reference to the webpack runtime variables. By using `Function::toString` against the values in `__webpack_modules__`, the attacker can get the source code. Version 5.2.1 contains a patch for the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-749 - Exposed Dangerous Method or Function
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/webpack/webpack-dev-server/sec… | x_refsource_CONFIRM |
| https://github.com/webpack/webpack-dev-server/com… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| webpack | webpack-dev-server |
Affected:
< 5.2.1
|
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CVE-2025-30360 (GCVE-0-2025-30360)
Vulnerability from nvd – Published: 2025-06-03 17:41 – Updated: 2025-06-03 17:58
VLAI
Title
webpack-dev-server users' source code may be stolen when they access a malicious web site with non-Chromium based browser
Summary
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)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-346 - Origin Validation Error
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/webpack/webpack-dev-server/sec… | x_refsource_CONFIRM |
| https://github.com/webpack/webpack-dev-server/com… | x_refsource_MISC |
| https://github.com/webpack/webpack-dev-server/com… | x_refsource_MISC |
| https://github.com/webpack/webpack-dev-server/blo… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| webpack | webpack-dev-server |
Affected:
< 5.2.1
|
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CVE-2025-30359 (GCVE-0-2025-30359)
Vulnerability from nvd – Published: 2025-06-03 17:39 – Updated: 2025-06-03 17:50
VLAI
Title
webpack-dev-server users' source code may be stolen when they access a malicious web site
Summary
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 origin policy, an attacker can inject a malicious script in their site and run the script. Note that the attacker has to know the port and the output entrypoint script path. Combined with prototype pollution, the attacker can get a reference to the webpack runtime variables. By using `Function::toString` against the values in `__webpack_modules__`, the attacker can get the source code. Version 5.2.1 contains a patch for the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-749 - Exposed Dangerous Method or Function
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/webpack/webpack-dev-server/sec… | x_refsource_CONFIRM |
| https://github.com/webpack/webpack-dev-server/com… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| webpack | webpack-dev-server |
Affected:
< 5.2.1
|
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