{"cve":"CVE-2018-20677","nvd":{"published":"2019-01-09T05:29:01.397","modified":"2026-06-17T01:53:18.187","status":"Modified","description":"In Bootstrap before 3.4.0, XSS is possible in the affix configuration target property.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["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"],"products":["getbootstrap:bootstrap"],"source":"nvd","synced_at":"2026-10-19T20:54:36.112582389+00:00"},"epss":{"cve":"CVE-2018-20677","score":0.03984,"percentile":0.90498,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-ph58-4vrj-w6hr","url":"https://osv.dev/vulnerability/GHSA-ph58-4vrj-w6hr","summary":"bootstrap Cross-site Scripting vulnerability","modified":"2026-09-10T03:47:59.283661706Z","packages":[{"ecosystem":"npm","name":"bootstrap","purl":"pkg:npm/bootstrap","ranges":["<3.4.0"],"fixed":["3.4.0"]},{"ecosystem":"npm","name":"bootstrap-sass","purl":"pkg:npm/bootstrap-sass","ranges":["<3.4.0"],"fixed":["3.4.0"]},{"ecosystem":"Packagist","name":"twbs/bootstrap","purl":"pkg:composer/twbs/bootstrap","ranges":["<3.4.0"],"fixed":["3.4.0"]},{"ecosystem":"Maven","name":"org.webjars:bootstrap","purl":"pkg:maven/org.webjars/bootstrap","ranges":["<3.4.0"],"fixed":["3.4.0"]},{"ecosystem":"RubyGems","name":"bootstrap","purl":"pkg:gem/bootstrap","ranges":["<3.4.0"],"fixed":["3.4.0"]},{"ecosystem":"RubyGems","name":"bootstrap-sass","purl":"pkg:gem/bootstrap-sass","ranges":["<3.4.0"],"fixed":["3.4.0"]},{"ecosystem":"NuGet","name":"bootstrap","purl":"pkg:nuget/bootstrap","ranges":["<3.4.0"],"fixed":["3.4.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}