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" }