{"cve":"CVE-2025-30360","nvd":{"published":"2025-06-03T18:15:25.410","modified":"2026-06-17T09:08:34.903","status":"Analyzed","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-346"],"references":["https://github.com/webpack/webpack-dev-server/blob/55220a800ba4e30dbde2d98785ecf4c80b32f711/lib/Server.js#L3113-L3127","https://github.com/webpack/webpack-dev-server/commit/5c9378bb01276357d7af208a0856ca2163db188e","https://github.com/webpack/webpack-dev-server/commit/72efaab83381a0e1c4914adf401cbd210b7de7eb","https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-9jgg-88mc-972h"],"products":["webpack.js:webpack-dev-server"],"source":"nvd","synced_at":"2026-10-19T22:02:23.998251710+00:00"},"epss":{"cve":"CVE-2025-30360","score":0.00357,"percentile":0.29481,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9jgg-88mc-972h","url":"https://osv.dev/vulnerability/GHSA-9jgg-88mc-972h","summary":"webpack-dev-server users' source code may be stolen when they access a malicious web site with non-Chromium based browser","modified":"2026-09-10T03:50:25.088634204Z","packages":[{"ecosystem":"npm","name":"webpack-dev-server","purl":"pkg:npm/webpack-dev-server","ranges":["<5.2.1"],"fixed":["5.2.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}