{"id":"CVE-2023-5356","aliases":["BIT-gitlab-2023-5356","EUVD-2023-57672","GHSA-x7v8-7cpc-hv73","UBUNTU-CVE-2023-5356"],"status":"published","title":"Incorrect Authorization in GitLab","description":"Incorrect authorization checks in GitLab CE/EE from all versions starting from 8.13 before 16.5.6, all versions starting from 16.6 before 16.6.4, all versions starting from 16.7 before 16.7.2, allows a user to abuse slack/mattermost integrations to execute slash commands as another user.","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00829,"percentile":0.57825,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-863"],"published":"2024-01-12T13:56:51Z","modified":"2026-10-30T10:46:40Z","fixes":[{"ecosystem":"Bitnami","package":"gitlab","fixed_in":["16.5.6","16.6.4","16.7.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"gitlab","ranges":[{"type":"SEMVER","events":[{"introduced":"8.13.0"},{"fixed":"16.5.6"},{"introduced":"16.6.0"},{"fixed":"16.6.4"},{"introduced":"16.7.0"},{"fixed":"16.7.2"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gitlab","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.3+dfsg-9","8.4.3+dfsg-12","8.5.8+dfsg-5"]}],"products":[{"vendor":"gitlab","product":"gitlab"}],"references":[{"url":"https://gitlab.com/gitlab-org/gitlab/-/issues/427154","tags":["issue-tracking","permissions-required","x_transferred","Broken Link","web","report"]},{"url":"https://hackerone.com/reports/2188868","tags":["technical-description","exploit","permissions-required","x_transferred","Permissions Required","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5356","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-x7v8-7cpc-hv73"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/5xxx/CVE-2023-5356.json","tags":["advisory"]},{"url":"git://git@gitlab.com:gitlab-org/gitlab.git","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2023-5356","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-5356","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-5356","title":"Incorrect Authorization in GitLab","description":"Incorrect authorization checks in GitLab CE/EE from all versions starting from 8.13 before 16.5.6, all versions starting from 16.6 before 16.6.4, all versions starting from 16.7 before 16.7.2, allows a user to abuse slack/mattermost integrations to execute slash commands as another user.","status":"published","published":"2024-01-12T13:56:51.714Z","modified":"2026-04-28T04:05:15.311Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:35:16.771348Z"}],"euvd":[{"id":"EUVD-2023-57672","description":"Incorrect authorization checks in GitLab CE/EE from all versions starting from 8.13 before 16.5.6, all versions starting from 16.6 before 16.6.4, all versions starting from 16.7 before 16.7.2, allows a user to abuse slack/mattermost integrations to execute slash commands as another user.","status":"published","published":"2024-01-12T13:56:51Z","modified":"2026-04-28T04:05:15Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T19:24:16.972131Z"}],"ghsa":[{"id":"GHSA-x7v8-7cpc-hv73","title":"Incorrect authorization checks in GitLab CE/EE from all versions starting from 8.13 before 16.5.6...","description":"Incorrect authorization checks in GitLab CE/EE from all versions starting from 8.13 before 16.5.6, all versions starting from 16.6 before 16.6.4, all versions starting from 16.7 before 16.7.2, allows a user to abuse slack/mattermost integrations to execute slash commands as another user.","status":"published","published":"2024-01-12T15:30:32Z","modified":"2024-01-12T15:30:37Z","cvss":[{"version":"3.1","score":9.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:55:24.514817Z"}],"nvd":[{"id":"CVE-2023-5356","description":"Incorrect authorization checks in GitLab CE/EE from all versions starting from 8.13 before 16.5.6, all versions starting from 16.6 before 16.6.4, all versions starting from 16.7 before 16.7.2, allows a user to abuse slack/mattermost integrations to execute slash commands as another user.","status":"published","published":"2024-01-12T14:15:48.707Z","modified":"2026-06-17T06:48:24.947Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:09:00.788714Z"}],"osv":[{"id":"CVE-2023-5356","title":"Incorrect Authorization in GitLab","description":"Incorrect authorization checks in GitLab CE/EE from all versions starting from 8.13 before 16.5.6, all versions starting from 16.6 before 16.6.4, all versions starting from 16.7 before 16.7.2, allows a user to abuse slack/mattermost integrations to execute slash commands as another user.","status":"published","published":"2024-01-12T13:56:51.714Z","modified":"2026-10-30T10:46:40.779944862Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:44:36.109881Z"},{"id":"UBUNTU-CVE-2023-5356","description":"Incorrect authorization checks in GitLab CE/EE from all versions starting from 8.13 before 16.5.6, all versions starting from 16.6 before 16.6.4, all versions starting from 16.7 before 16.7.2, allows a user to abuse slack/mattermost integrations to execute slash commands as another user.","status":"published","published":"2024-01-12T14:15:00Z","modified":"2025-10-24T05:01:36Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T16:54:32.299999Z"},{"id":"BIT-gitlab-2023-5356","title":"Incorrect Authorization in GitLab","description":"Incorrect authorization checks in GitLab CE/EE from all versions starting from 8.13 before 16.5.6, all versions starting from 16.6 before 16.6.4, all versions starting from 16.7 before 16.7.2, allows a user to abuse slack/mattermost integrations to execute slash commands as another user.","status":"published","published":"2024-03-06T10:56:46.996Z","modified":"2026-09-10T16:01:36.680440916Z","updated_at":"2026-11-02T15:28:30.405543Z"}]}}