In Bootstrap before 3.4.0, XSS is possible in the affix configuration target property.
https://access.redhat.com/errata/RHBA-2019:1076
https://access.redhat.com/errata/RHBA-2019:1570
https://access.redhat.com/errata/RHSA-2019:1456
https://access.redhat.com/errata/RHSA-2019:3023
https://access.redhat.com/errata/RHSA-2020:0132
https://access.redhat.com/errata/RHSA-2020:0133
https://github.com/twbs/bootstrap/issues/27045
https://github.com/twbs/bootstrap/issues/27915#issuecomment-452140906
https://github.com/twbs/bootstrap/issues/27915#issuecomment-452196628