{"id":"CVE-2021-26600","aliases":["GHSA-m8xh-cqc2-5q6f"],"url":"https://o3.security/vulnerability/CVE-2021-26600","summary":"Type Confusion in ImpressCMS","details":"ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).","published":"2022-03-28T01:15:06.927Z","modified":"2026-07-09T01:30:28.384885Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":3,"affectedPackages":[{"ecosystem":"Packagist","name":"impresscms/impresscms","fixedVersion":"1.4.3"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://karmainsecurity.com/KIS-2022-01"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/166393/ImpressCMS-1.4.2-Authentication-Bypass.html"},{"type":"EVIDENCE","url":"http://seclists.org/fulldisclosure/2022/Mar/43"},{"type":"EVIDENCE","url":"https://hackerone.com/reports/1081986"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T01:30:28.384885Z"}}