This affects the package @scullyio/scully before 1.0.9. The transfer state is serialised with the JSON.stringify() function and then written into the HTML page.
{
"severity": "HIGH",
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2021-04-06T21:40:15Z",
"nvd_published_at": "2021-01-14T10:15:00Z"
}