CVE-2018-14732

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.

CVSS v3.0 NVD

7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v2.0 NVD

5.0 MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N

EPSS

2.56% chance of exploitation in the next 30 days, 85th percentile

Published

2018-09-21

Updated

2024-08-05

Proof-of-concept exploits (1)

• webpack/webpack-dev-server/issues/14457842★ · 2026-10-16

Security advisories

• https://blog.cal1.cn/post/Sniffing%20Codes%20in%20Hot%20Module%20Reloading%20Messages
• advisories/GHSA-cf66-xwfp-gvc4

References

• CVE Record
• NVD entry

Related

• CVE-2022-37601