In Bootstrap before 3.4.0, XSS is possible in the tooltip data-viewport attribute.
https://www.tenable.com/security/tns-2021-14
https://github.com/twbs/bootstrap/pull/27047
https://github.com/twbs/bootstrap/issues/27915#issuecomment-452196628
https://github.com/twbs/bootstrap/issues/27915#issuecomment-452140906
https://github.com/twbs/bootstrap/issues/27044
https://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0/
https://access.redhat.com/errata/RHSA-2020:0133
https://access.redhat.com/errata/RHSA-2020:0132
https://access.redhat.com/errata/RHSA-2019:3023
https://access.redhat.com/errata/RHSA-2019:1456