In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().
{
"cwe_ids": [
"CWE-940"
],
"github_reviewed": true,
"github_reviewed_at": "2021-11-12T19:46:56Z",
"nvd_published_at": "2021-11-10T17:15:00Z",
"severity": "MODERATE"
}