{"id":"CVE-2025-30360","aliases":["GHSA-9jgg-88mc-972h"],"url":"https://o3.security/vulnerability/CVE-2025-30360","summary":"webpack-dev-server users' source code may be stolen when they access a malicious web site with non-Chromium based browser","details":"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.","published":"2025-06-03T17:41:59.457Z","modified":"2026-07-15T01:49:18.341784277Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"webpack-dev-server","fixedVersion":"5.2.1"}],"fix":{"url":"https://github.com/webpack/webpack-dev-server/commit/5c9378bb01276357d7af208a0856ca2163db188e","label":"webpack/webpack-dev-server@5c9378b"},"references":[{"type":"WEB","url":"https://github.com/webpack/webpack-dev-server/blob/55220a800ba4e30dbde2d98785ecf4c80b32f711/lib/Server.js#L3113-L3127"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/30xxx/CVE-2025-30360.json"},{"type":"ADVISORY","url":"https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-9jgg-88mc-972h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-30360"},{"type":"FIX","url":"https://github.com/webpack/webpack-dev-server/commit/5c9378bb01276357d7af208a0856ca2163db188e"},{"type":"FIX","url":"https://github.com/webpack/webpack-dev-server/commit/72efaab83381a0e1c4914adf401cbd210b7de7eb"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:18.341784277Z"}}