{"id":"CVE-2018-11627","aliases":["GHSA-mq35-wqvf-r23c"],"url":"https://o3.security/vulnerability/CVE-2018-11627","summary":"Sinatra Cross-site Scripting vulnerability","details":"Sinatra before 2.0.2 has XSS via the 400 Bad Request page that occurs upon a params parser exception.","published":"2018-05-31T19:29:00.203Z","modified":"2026-07-08T05:52:13.646911586Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"RubyGems","name":"sinatra","fixedVersion":"2.0.2"}],"fix":{"url":"https://github.com/sinatra/sinatra/commit/12786867d6faaceaec62c7c2cb5b0e2dc074d71a","label":"sinatra/sinatra@1278686"},"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0212"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0315"},{"type":"FIX","url":"https://github.com/sinatra/sinatra/commit/12786867d6faaceaec62c7c2cb5b0e2dc074d71a"},{"type":"EVIDENCE","url":"https://github.com/sinatra/sinatra/issues/1428"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:52:13.646911586Z"}}