Versions of webpack-dev-server before 3.1.10 are missing origin validation on the websocket server. This vulnerability allows a remote attacker to steal a developer's source code because the origin of requests to the websocket server that is used for Hot Module Replacement (HMR) are not validated.
For webpack-dev-server update to version 3.1.11 or later.
{
"github_reviewed": true,
"severity": "HIGH",
"cwe_ids": [
"CWE-20"
],
"nvd_published_at": null,
"github_reviewed_at": "2020-06-16T21:31:15Z"
}