{"id":"CVE-2020-1776","aliases":["DEBIAN-CVE-2020-1776","DLA-3551-1","EUVD-2020-12602","GHSA-vcrm-8v3j-v6f3","UBUNTU-CVE-2020-1776"],"status":"published","title":"Invalidating or changing user does not invalidate session","description":"When an agent user is renamed or set to invalid the session belonging to the user is keept active. The session can not be used to access ticket data in the case the agent is invalid. This issue affects ((OTRS)) Community Edition: 6.0.28 and prior versions. OTRS: 7.0.18 and prior versions, 8.0.4. and prior versions.","severity":{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00918,"percentile":0.60501,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-613"],"published":"2020-07-20T21:04:19Z","modified":"2026-08-27T13:02:28Z","fixes":[{"ecosystem":"Debian:11","package":"otrs2","fixed_in":["6.0.29-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:11","package":"otrs2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.29-1"}]}],"versions":["2.0.4p01-10","2.0.4p01-11","2.0.4p01-12","2.0.4p01-13","2.0.4p01-14","2.0.4p01-14.1","2.0.4p01-15","2.0.4p01-16","2.0.4p01-17","2.0.4p01-18","2.0.4p01-6","2.0.4p01-7","2.0.4p01-8","2.0.4p01-9","2.0.99beta1-1","2.0.99beta1-2","2.1.1-1","2.1.3-1","2.1.4-1","2.1.4-2","2.1.5-1","2.1.5-2","2.1.5-3","2.1.6-1","2.1.7-1","2.1.7-2","2.2.0~beta2-1","2.2.0~beta3-1","2.2.1-1","2.2.2-1","2.2.3-1","2.2.4-1","2.2.5-1","2.2.5-2","2.2.6-1","2.2.7-1","2.2.7-2","2.2.7-2lenny1","2.2.7-2lenny2","2.2.7-2lenny3","2.2.7-3","2.3.2-1","2.3.2-2","2.3.3-1","2.3.4-1","2.3.4-2","2.3.4-3","2.3.4-4","2.3.4-5","2.3.4-6","2.3.4-7","2.4.10+dfsg1-1","2.4.10+dfsg1-2","2.4.10+dfsg1-3","2.4.5-1","2.4.5-2","2.4.5-3","2.4.5-4","2.4.5-5","2.4.6-1","2.4.6-2","2.4.7+dfsg1-1","2.4.7-1","2.4.7-2","2.4.7-3","2.4.7-4","2.4.7-5","2.4.7-6","2.4.8+dfsg1-1","2.4.9+dfsg1-1","2.4.9+dfsg1-2","2.4.9+dfsg1-3","2.4.9+dfsg1-3+squeeze1","2.4.9+dfsg1-3+squeeze3","2.4.9+dfsg1-3+squeeze4","2.4.9+dfsg1-3+squeeze5","2.4.9+dfsg1-4","2.4.9+dfsg1-5","3.0.10+dfsg1-1","3.0.10+dfsg1-2","3.0.11+dfsg1-1","3.0.8+dfsg1-1","3.0.9+dfsg1-1","3.1.0~beta4+dfsg1-1","3.1.0~beta5+dfsg1-1","3.1.0~rc1+dfsg1-1","3.1.1+dfsg1-1","3.1.1+dfsg1-2","3.1.10+dfsg1-1","3.1.11+dfsg1-1","3.1.12+dfsg1-1","3.1.12+dfsg1-2","3.1.12+dfsg1-3","3.1.2+dfsg1-1","3.1.2+dfsg1-2","3.1.2+dfsg1-3","3.1.3+dfsg1-1","3.1.3+dfsg1-2","3.1.4+dfsg1-1","3.1.5+dfsg1-1","3.1.5+dfsg1-2","3.1.5+dfsg1-3","3.1.6+dfsg1-1","3.1.7+dfsg1-1","3.1.7+dfsg1-2","3.1.7+dfsg1-3","3.1.7+dfsg1-4","3.1.7+dfsg1-5","3.1.7+dfsg1-6","3.1.7+dfsg1-7","3.1.7+dfsg1-8","3.1.8+dfsg1-1","3.1.9+dfsg1-1","3.2.1+dfsg1-1","3.2.10-1","3.2.10-2","3.2.11-1","3.2.11-1~bpo70+1","3.2.12-1","3.2.2+dfsg1-1","3.2.3+dfsg1-1","3.2.4-1","3.2.5-1","3.2.6-1","3.2.6-2","3.2.7-1","3.2.7-2","3.2.8-1","3.2.9-1","3.2.9-2","3.3.1-1","3.3.10-1","3.3.11-1","3.3.18-1~deb7u1","3.3.18-1~deb7u2","3.3.18-1~deb7u3","3.3.2-1","3.3.3-1","3.3.3-2","3.3.3-3","3.3.4-1","3.3.5-1","3.3.6-1","3.3.7-1","3.3.7-2","3.3.8-1","3.3.9-1","3.3.9-2","3.3.9-3","3.3.9-3~bpo70+1","4.0.10-1","4.0.11-1","4.0.12-1","4.0.13-1","4.0.13-1~bpo8+1","4.0.5-1","4.0.5-2","4.0.6-1","4.0.7-1","4.0.7-2","4.0.8-1","4.0.9-1","5.0.1-1","5.0.1-2","5.0.10-1","5.0.10-1~bpo8+1","5.0.11-1","5.0.12-1","5.0.13-1","5.0.13-1~bpo8+1","5.0.13-2","5.0.14-1","5.0.14-1~bpo8+1","5.0.15-1","5.0.16-1","5.0.16-1~bpo8+1","5.0.17-1","5.0.18-1","5.0.19-1","5.0.2-1","5.0.20-1","5.0.21-1","5.0.21-1~bpo9+1","5.0.22-1","5.0.23-1","5.0.23-1~bpo9+1","5.0.24-1","5.0.24-1~bpo9+1","5.0.3-1","5.0.5-1","5.0.6-1","5.0.6-1~bpo8+1","5.0.7-1","5.0.8+dfsg1-1","5.0.8-1","5.0.8-1~bpo8+1","5.0.9+dfsg1-1","5.0.9+repack1-1","6.0.1-1","6.0.10-1","6.0.11-1","6.0.11-1~bpo9+1","6.0.12-1","6.0.12-1~bpo9+1","6.0.13-1","6.0.14-1","6.0.15-1","6.0.16-1","6.0.16-2","6.0.17-1","6.0.18-1","6.0.19-1","6.0.2-1","6.0.20-1","6.0.20-1~bpo10+1","6.0.21-1","6.0.22-1","6.0.23-1","6.0.23-2","6.0.24-1","6.0.24-1~bpo10+1","6.0.25-1","6.0.25-2","6.0.25-3","6.0.25-3~bpo10+1","6.0.26-1","6.0.26-1~bpo10+1","6.0.27-1","6.0.27-1~bpo10+1","6.0.28-1","6.0.28-1~bpo10+1","6.0.28-2","6.0.29-1~bpo10+1","6.0.3-1","6.0.4-1","6.0.5-1","6.0.6-1","6.0.7-1","6.0.8-1","6.0.8-1~bpo9+1","6.0.9-1","6.0.9-1~bpo9+1"]},{"source":"osv","ecosystem":"Debian:10","package":"otrs2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.16-2+deb10u1"}]}],"versions":["2.0.4p01-10","2.0.4p01-11","2.0.4p01-12","2.0.4p01-13","2.0.4p01-14","2.0.4p01-14.1","2.0.4p01-15","2.0.4p01-16","2.0.4p01-17","2.0.4p01-18","2.0.4p01-6","2.0.4p01-7","2.0.4p01-8","2.0.4p01-9","2.0.99beta1-1","2.0.99beta1-2","2.1.1-1","2.1.3-1","2.1.4-1","2.1.4-2","2.1.5-1","2.1.5-2","2.1.5-3","2.1.6-1","2.1.7-1","2.1.7-2","2.2.0~beta2-1","2.2.0~beta3-1","2.2.1-1","2.2.2-1","2.2.3-1","2.2.4-1","2.2.5-1","2.2.5-2","2.2.6-1","2.2.7-1","2.2.7-2","2.2.7-2lenny1","2.2.7-2lenny2","2.2.7-2lenny3","2.2.7-3","2.3.2-1","2.3.2-2","2.3.3-1","2.3.4-1","2.3.4-2","2.3.4-3","2.3.4-4","2.3.4-5","2.3.4-6","2.3.4-7","2.4.10+dfsg1-1","2.4.10+dfsg1-2","2.4.10+dfsg1-3","2.4.5-1","2.4.5-2","2.4.5-3","2.4.5-4","2.4.5-5","2.4.6-1","2.4.6-2","2.4.7+dfsg1-1","2.4.7-1","2.4.7-2","2.4.7-3","2.4.7-4","2.4.7-5","2.4.7-6","2.4.8+dfsg1-1","2.4.9+dfsg1-1","2.4.9+dfsg1-2","2.4.9+dfsg1-3","2.4.9+dfsg1-3+squeeze1","2.4.9+dfsg1-3+squeeze3","2.4.9+dfsg1-3+squeeze4","2.4.9+dfsg1-3+squeeze5","2.4.9+dfsg1-4",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ag","product":"((otrs)) community edition"},{"vendor":"otrs ag","product":"otrs"}],"references":[{"url":"https://otrs.com/release-notes/otrs-security-advisory-2020-13/","tags":["x_transferred","Patch","Vendor Advisory","fix","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html","tags":["mailing-list","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-1776"},{"url":"https://github.com/advisories/GHSA-vcrm-8v3j-v6f3"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-1776","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-1776","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-1776","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-1776","title":"Invalidating or changing user does not invalidate session","description":"When an agent user is renamed or set to invalid the session belonging to the user is keept active. The session can not be used to access ticket data in the case the agent is invalid. This issue affects ((OTRS)) Community Edition: 6.0.28 and prior versions. OTRS: 7.0.18 and prior versions, 8.0.4. and prior versions.","status":"published","published":"2020-07-20T21:04:19.291Z","modified":"2024-09-17T00:26:58.722Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-613"],"updated_at":"2026-11-02T14:35:56.213477Z"}],"euvd":[{"id":"EUVD-2020-12602","description":"When an agent user is renamed or set to invalid the session belonging to the user is keept active. The session can not be used to access ticket data in the case the agent is invalid. This issue affects ((OTRS)) Community Edition: 6.0.28 and prior versions. OTRS: 7.0.18 and prior versions, 8.0.4. and prior versions.","status":"published","published":"2020-07-20T21:04:19Z","modified":"2024-09-17T00:26:58Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-03T00:28:58.853192Z"}],"ghsa":[{"id":"GHSA-vcrm-8v3j-v6f3","title":"When an agent user is renamed or set to invalid the session belonging to the user is keept active...","description":"When an agent user is renamed or set to invalid the session belonging to the user is keept active. The session can not be used to access ticket data in the case the agent is invalid.\n\nThis issue affects\n((OTRS)) Community Edition: \n6.0.28 and prior versions.\n\nOTRS:\n7.0.18 and prior versions,\n8.0.4. and prior versions.","status":"published","published":"2022-05-24T17:23:59Z","modified":"2023-09-08T05:03:05Z","cvss":[{"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"}],"cwes":["CWE-613"],"updated_at":"2026-11-02T14:54:46.481792Z"}],"nvd":[{"id":"CVE-2020-1776","description":"When an agent user is renamed or set to invalid the session belonging to the user is keept active. The session can not be used to access ticket data in the case the agent is invalid. This issue affects ((OTRS)) Community Edition: 6.0.28 and prior versions. OTRS: 7.0.18 and prior versions, 8.0.4. and prior versions.","status":"published","published":"2020-07-20T21:15:12.577Z","modified":"2026-06-17T03:02:22.91Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N","level":"low","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-613"],"updated_at":"2026-11-02T14:06:10.086163Z"}],"osv":[{"id":"CVE-2020-1776","description":"When an agent user is renamed or set to invalid the session belonging to the user is keept active. The session can not be used to access ticket data in the case the agent is invalid. This issue affects ((OTRS)) Community Edition: 6.0.28 and prior versions. OTRS: 7.0.18 and prior versions, 8.0.4. and prior versions.","status":"published","published":"2020-07-20T21:15:12.577Z","modified":"2026-03-14T10:19:35.381993Z","cvss":[{"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":"2026-11-02T15:44:15.212689Z"},{"id":"DEBIAN-CVE-2020-1776","description":"When an agent user is renamed or set to invalid the session belonging to the user is keept active. The session can not be used to access ticket data in the case the agent is invalid. This issue affects ((OTRS)) Community Edition: 6.0.28 and prior versions. OTRS: 7.0.18 and prior versions, 8.0.4. and prior versions.","status":"published","published":"2020-07-20T21:15:12.577Z","modified":"2026-08-27T13:02:28.025657512Z","cvss":[{"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":"2026-11-02T15:45:33.384087Z"},{"id":"UBUNTU-CVE-2020-1776","description":"When an agent user is renamed or set to invalid the session belonging to the user is keept active. The session can not be used to access ticket data in the case the agent is invalid. This issue affects ((OTRS)) Community Edition: 6.0.28 and prior versions. OTRS: 7.0.18 and prior versions, 8.0.4. and prior versions.","status":"published","published":"2020-07-20T21:15:00Z","modified":"2025-10-24T04:48:15Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N","level":"low"},{"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"},{"id":"DLA-3551-1","title":"otrs2 - security update","status":"published","published":"2023-08-31T00:00:00Z","modified":"2026-03-09T01:23:23.492308Z","updated_at":"2026-11-02T15:46:11.734021Z"}]}}