{"id":"CVE-2020-5415","aliases":["BIT-concourse-2020-5415","GHSA-627p-rr78-99rj"],"url":"https://o3.security/vulnerability/CVE-2020-5415","summary":"GitLab auth uses full name instead of username as user ID, allowing impersonation","details":"Concourse, versions prior to 6.3.1 and 6.4.1, in installations which use the GitLab auth connector, is vulnerable to identity spoofing by way of configuring a GitLab account with the same full name as another user who is granted access to a Concourse team. GitLab groups do not have this vulnerability, so GitLab users may be moved into groups which are then configured in the Concourse team.","published":"2020-08-12T17:15:12.633Z","modified":"2026-07-09T02:49:33.168264Z","cvss":{"score":10,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/concourse/concourse","fixedVersion":"6.4.1"},{"ecosystem":"Go","name":"github.com/concourse/concourse","fixedVersion":"6.3.1"},{"ecosystem":"Go","name":"github.com/concourse/dex","fixedVersion":"6.4.1"},{"ecosystem":"Go","name":"github.com/concourse/dex","fixedVersion":"6.3.1"},{"ecosystem":"Go","name":"github.com/concourse/dex","fixedVersion":"0.0.0-20200730150203-821b48abfd88"},{"ecosystem":"Go","name":"github.com/concourse/concourse","fixedVersion":"0.0.0-20200730151558-b00d1c8d8576"},{"ecosystem":"Go","name":"github.com/concourse/concourse","fixedVersion":"1.6.1-0.20200730151558-b00d1c8d8576"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://tanzu.vmware.com/security/cve-2020-5415"},{"type":"FIX","url":"https://github.com/concourse/concourse/security/advisories/GHSA-627p-rr78-99rj"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T02:49:33.168264Z"}}