CVEvulnerability
CVE-2018-14732
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2018-09-21
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 7.5 HIGH — CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-20
Description
An issue was discovered in lib/Server.js in webpack-dev-server before 3.1.6. Attackers are able to steal developer's code because the origin of requests is not checked by the WebSocket server, which is used for HMR (Hot Module Replacement). Anyone can receive the HMR message sent by the WebSocket server via a ws://127.0.0.1:8080/ connection from any origin.
Affected configurations
• webpack.js webpack-dev-server (< 3.1.6)
Related
Weakness · CWE (1)
- CWE-20 Improper Input Validation weakness
Referenced by CWE · observed example (1)
- CWE-1385 Missing Origin Validation in WebSockets weakness
References
- https://blog.cal1.cn/post/Sniffing%20Codes%20in%20Hot%20Module%20Reloading%20Messages Exploit, Third Party Advisory
- https://github.com/webpack/webpack-dev-server/commit/f18e5adf123221a1015be63e1ca2491ca45b8d10 Patch, Third Party Advisory
- https://github.com/webpack/webpack-dev-server/issues/1445 Exploit, Third Party Advisory
- https://blog.cal1.cn/post/Sniffing%20Codes%20in%20Hot%20Module%20Reloading%20Messages Exploit, Third Party Advisory
- https://github.com/webpack/webpack-dev-server/commit/f18e5adf123221a1015be63e1ca2491ca45b8d10 Patch, Third Party Advisory
- https://github.com/webpack/webpack-dev-server/issues/1445 Exploit, Third Party Advisory