{"id":"CVE-2020-18698","aliases":["EUVD-2021-0110","GHSA-h6r2-pgvx-683c","PYSEC-2021-339"],"status":"published","title":"Lin-CMS-Flask vulnerable to Improper Authentication","description":"Improper Authentication in Lin-CMS-Flask v0.1.1 allows remote attackers to launch brute force login attempts without restriction via the 'login' function in the component 'app/api/cms/user.py'.","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":0.02082,"percentile":0.81786,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-307"],"published":"2021-08-16T17:54:46Z","modified":"2026-06-17T02:59:24Z","affected":[{"source":"ghsa","ecosystem":"PyPI","package":"lin-cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.1.1"},{"last_affected":"0.1.1"}]}],"versions":["0.1.1"]},{"source":"osv","ecosystem":"PyPI","package":"lin-cms","versions":["0.1.1"]},{"source":"osv","ecosystem":"PyPI","package":"lin-cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.1.1a1","0.1.1a2","0.1.1a3","0.1.1a4","0.1.1a5","0.1.1a6","0.1.1a7","0.1.1a8","0.1.1b1","0.1.1b2","0.1.1b3","0.1.1b4","0.2.0b1","0.2.0b2","0.2.0b3","0.3.0a10","0.3.0a2","0.3.0a3","0.3.0a4","0.3.0a5","0.3.0a6","0.3.0a7","0.3.0a8","0.3.0a9","0.3.1","0.4.0","0.4.10","0.4.11","0.4.2","0.4.3","0.4.4","0.4.5","0.4.6","0.4.7","0.4.8","0.4.9"]}],"products":[{"vendor":"talelin","product":"lin-cms-flask"}],"references":[{"url":"https://github.com/TaleLin/lin-cms-flask/issues/27","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","web","report"]},{"url":"https://cwe.mitre.org/data/definitions/307.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-18698","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/lin-cms/PYSEC-2021-339.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-h6r2-pgvx-683c","tags":["advisory"]},{"url":"https://github.com/TaleLin/lin-cms-flask","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-18698","description":"Improper Authentication in Lin-CMS-Flask v0.1.1 allows remote attackers to launch brute force login attempts without restriction via the 'login' function in the component 'app/api/cms/user.py'.","status":"published","published":"2021-08-16T17:54:46Z","modified":"2024-08-04T14:08:29.841Z","updated_at":"2026-11-02T14:35:59.434367Z"}],"euvd":[{"id":"EUVD-2021-0110","description":"Improper Authentication in Lin-CMS-Flask v0.1.1 allows remote attackers to launch brute force login attempts without restriction via the 'login' function in the component 'app/api/cms/user.py'.","status":"published","published":"2021-08-16T17:54:46Z","modified":"2024-08-04T14:08:29Z","updated_at":"2026-11-03T03:07:26.397496Z"}],"ghsa":[{"id":"GHSA-h6r2-pgvx-683c","title":"Lin-CMS-Flask vulnerable to Improper Authentication","description":"Improper Authentication in Lin-CMS-Flask v0.1.1 allows remote attackers to launch brute force login attempts without restriction via the 'login' function in the component `app/api/cms/user.py`.","status":"published","published":"2022-05-24T19:11:15Z","modified":"2024-09-30T16:41:54Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"},{"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-307"],"updated_at":"2026-11-02T14:38:06.988799Z"}],"nvd":[{"id":"CVE-2020-18698","description":"Improper Authentication in Lin-CMS-Flask v0.1.1 allows remote attackers to launch brute force login attempts without restriction via the 'login' function in the component 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`app/api/cms/user.py`.","status":"published","published":"2022-05-24T19:11:15Z","modified":"2026-06-10T18:45:05Z","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"},{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T15:46:48.546324Z"},{"id":"PYSEC-2021-339","description":"Improper Authentication in Lin-CMS-Flask v0.1.1 allows remote attackers to launch brute force login attempts without restriction via the 'login' function in the component 'app/api/cms/user.py'.","status":"published","published":"2021-08-16T18:15:00Z","modified":"2026-06-10T17:00:34.580071164Z","updated_at":"2026-11-02T15:52:52.682031Z"}]}}