{"id":"CVE-2020-1778","aliases":["EUVD-2020-12604","GHSA-vwfv-p8p3-m4r7","UBUNTU-CVE-2020-1778"],"status":"published","title":"Bypassing user account validation","description":"When OTRS uses multiple backends for user authentication (with LDAP), agents are able to login even if the account is set to invalid. This issue affects OTRS; 8.0.9 and prior versions.","severity":{"version":"3.1","score":4.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00651,"percentile":0.51651,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2020-11-23T15:32:46Z","modified":"2026-06-17T03:02:23Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"otrs2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.10-1","5.0.1-1","5.0.1-2","5.0.2-1","5.0.3-1","5.0.5-1","5.0.6-1","5.0.7-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"otrs2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.23-1","5.0.24-1","6.0.1-1","6.0.2-1","6.0.3-1","6.0.4-1","6.0.5-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"otrs2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.20-1","6.0.23-2","6.0.24-1","6.0.25-1","6.0.25-2","6.0.25-3","6.0.26-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"otrs2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.32-6","6.1.2-1","6.2.1-1","6.2.2-2"]}],"products":[{"vendor":"otrs","product":"otrs"},{"vendor":"otrs ag","product":"otrs"}],"references":[{"url":"https://otrs.com/release-notes/otrs-security-advisory-2020-16/","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Vendor Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-1778"},{"url":"https://github.com/advisories/GHSA-vwfv-p8p3-m4r7"},{"url":"https://ubuntu.com/security/CVE-2020-1778","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-1778","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-1778","title":"Bypassing user account validation","description":"When OTRS uses multiple backends for user authentication (with LDAP), agents are able to login even if the account is set to invalid. This issue affects OTRS; 8.0.9 and prior versions.","status":"published","published":"2020-11-23T15:32:46.74Z","modified":"2024-09-16T23:40:42.844Z","cvss":[{"version":"3.1","score":4.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:35:56.638833Z"}],"euvd":[{"id":"EUVD-2020-12604","description":"When OTRS uses multiple backends for user authentication (with LDAP), agents are able to login even if the account is set to invalid. This issue affects OTRS; 8.0.9 and prior versions.","status":"published","published":"2020-11-23T15:32:46Z","modified":"2024-09-16T23:40:42Z","cvss":[{"version":"3.1","score":4.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:54:48.177577Z"}],"ghsa":[{"id":"GHSA-vwfv-p8p3-m4r7","title":"When OTRS uses multiple backends for user authentication (with LDAP), agents are able to login...","description":"When OTRS uses multiple backends for user authentication (with LDAP), agents are able to login even if the account is set to invalid. This issue affects OTRS; 8.0.9 and prior versions.","status":"published","published":"2022-05-24T17:34:49Z","modified":"2023-01-29T05:04:47Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:45:38.359776Z"}],"nvd":[{"id":"CVE-2020-1778","description":"When OTRS uses multiple backends for user authentication (with LDAP), agents are able to login even if the account is set to invalid. This issue affects OTRS; 8.0.9 and prior versions.","status":"published","published":"2020-11-23T16:15:13.12Z","modified":"2026-06-17T03:02:23.147Z","cvss":[{"version":"3.1","score":4.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:06:25.394006Z"}],"osv":[{"id":"UBUNTU-CVE-2020-1778","description":"When OTRS uses multiple backends for user authentication (with LDAP), agents are able to login even if the account is set to invalid. This issue affects OTRS; 8.0.9 and prior versions.","status":"published","published":"2020-11-23T16:15:00Z","modified":"2025-10-24T04:48:15Z","cvss":[{"version":"3.1","score":4.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:23.344108Z"}]}}