In Bootstrap before 3.4.0, XSS is possible in the tooltip data-viewport attribute.
{
"nvd_published_at": "2019-01-09T05:29:00Z",
"cwe_ids": [
"CWE-79"
],
"severity": "MODERATE",
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T20:55:33Z"
}