{"id":"CVE-2021-4000","aliases":["GHSA-8c9x-wfgj-v78w"],"url":"https://o3.security/vulnerability/CVE-2021-4000","summary":"Open Redirect in showdoc","details":"showdoc is vulnerable to URL Redirection to Untrusted Site","published":"2021-12-03T11:15:07.883Z","modified":"2026-07-09T00:36:44.570088Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Packagist","name":"showdoc/showdoc","fixedVersion":null}],"fix":{"url":"https://github.com/star7th/showdoc/commit/c7f10033eba5f2b5a537f9af9ba2379138e67138","label":"star7th/showdoc@c7f1003"},"references":[{"type":"FIX","url":"https://github.com/star7th/showdoc/commit/c7f10033eba5f2b5a537f9af9ba2379138e67138"},{"type":"EVIDENCE","url":"https://huntr.dev/bounties/e4d803e0-3104-432c-80b3-34bc453c8962"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T00:36:44.570088Z"}}