{"id":"CVE-2021-26600","aliases":["EUVD-2022-1471","GHSA-m8xh-cqc2-5q6f"],"status":"published","title":"Type Confusion in ImpressCMS","description":"ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.0563,"percentile":0.93046,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-843"],"published":"2022-03-28T00:48:40Z","modified":"2026-10-24T10:31:02Z","fixes":[{"ecosystem":"Packagist","package":"impresscms/impresscms","fixed_in":["1.4.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"impresscms/impresscms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.3"}]}]},{"source":"osv","ecosystem":"Packagist","package":"impresscms/impresscms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.3"}]}]}],"products":[{"vendor":"impresscms","product":"impresscms"}],"references":[{"url":"https://hackerone.com/reports/1081986","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"http://packetstormsecurity.com/files/166393/ImpressCMS-1.4.2-Authentication-Bypass.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","VDB Entry","evidence","web"]},{"url":"http://seclists.org/fulldisclosure/2022/Mar/43","tags":["x_refsource_MISC","x_transferred","Exploit","Mailing List","Third Party Advisory","evidence","web"]},{"url":"http://karmainsecurity.com/KIS-2022-01","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26600","tags":["advisory"]},{"url":"https://github.com/ImpressCMS/impresscms/releases/tag/v1.4.3","tags":["web"]},{"url":"https://github.com/advisories/GHSA-m8xh-cqc2-5q6f"},{"url":"https://github.com/ImpressCMS/impresscms","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-26600","description":"ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).","status":"published","published":"2022-03-28T00:48:40Z","modified":"2024-08-03T20:26:25.505Z","updated_at":"2026-11-02T14:32:57.368269Z"}],"euvd":[{"id":"EUVD-2022-1471","description":"ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).","status":"published","published":"2022-03-28T00:48:40Z","modified":"2024-08-03T20:26:25Z","updated_at":"2026-11-03T03:24:51.40664Z"}],"ghsa":[{"id":"GHSA-m8xh-cqc2-5q6f","title":"Type Confusion in ImpressCMS","description":"ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).","status":"published","published":"2022-03-29T00:01:16Z","modified":"2023-01-27T05:01:04Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:36:16.28305Z"}],"nvd":[{"id":"CVE-2021-26600","description":"ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).","status":"published","published":"2022-03-28T01:15:06.927Z","modified":"2026-06-17T03:43:32.703Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:07:05.581807Z"}],"osv":[{"id":"CVE-2021-26600","description":"ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).","status":"published","published":"2022-03-28T01:15:06.927Z","modified":"2026-10-24T10:31:02.925157232Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:18.778776Z"},{"id":"GHSA-m8xh-cqc2-5q6f","title":"Type Confusion in ImpressCMS","description":"ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).","status":"published","published":"2022-03-29T00:01:16Z","modified":"2023-11-08T04:05:21.668002Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T15:46:51.463834Z"}]}}