{"id":"CVE-2020-5409","aliases":["BIT-concourse-2020-5409","EUVD-2020-26583"],"status":"published","title":"Concourse Open Redirect in the /sky/login endpoint","description":"Pivotal Concourse, most versions prior to 6.0.0, allows redirects to untrusted websites in its login flow. A remote unauthenticated attacker could convince a user to click on a link using the OAuth redirect link with an untrusted website and gain access to that user's access token in Concourse. (This issue is similar to, but distinct from, CVE-2018-15798.)","severity":{"version":"3.0","score":7.6,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00907,"percentile":0.602,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-601"],"published":"2020-05-13T23:15:17Z","modified":"2026-10-24T10:30:44Z","fixes":[{"ecosystem":"Bitnami","package":"concourse","fixed_in":["5.2.8","5.5.10","5.8.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"concourse","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.2.8"},{"introduced":"5.3.0"},{"fixed":"5.5.10"},{"introduced":"5.6.0"},{"fixed":"5.8.1"}]}]}],"products":[{"vendor":"pivotal","product":"concourse"},{"vendor":"pivotal_software","product":"concourse"}],"references":[{"url":"https://tanzu.vmware.com/security/cve-2020-5409","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-5409","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2020-5409","title":"Concourse Open Redirect in the /sky/login endpoint","description":"Pivotal Concourse, most versions prior to 6.0.0, allows redirects to untrusted websites in its login flow. A remote unauthenticated attacker could convince a user to click on a link using the OAuth redirect link with an untrusted website and gain access to that user's access token in Concourse. (This issue is similar to, but distinct from, CVE-2018-15798.)","status":"published","published":"2020-05-13T23:15:17.452Z","modified":"2024-09-17T02:47:32.788Z","cvss":[{"version":"3.0","score":7.6,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:35:47.22408Z"}],"euvd":[{"id":"EUVD-2020-26583","description":"Pivotal Concourse, most versions prior to 6.0.0, allows redirects to untrusted websites in its login flow. A remote unauthenticated attacker could convince a user to click on a link using the OAuth redirect link with an untrusted website and gain access to that user's access token in Concourse. (This issue is similar to, but distinct from, CVE-2018-15798.)","status":"published","published":"2020-05-13T23:15:17Z","modified":"2024-09-17T02:47:32Z","cvss":[{"version":"3.0","score":7.6,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","level":"high"}],"updated_at":"2026-11-03T00:28:37.375568Z"}],"nvd":[{"id":"CVE-2020-5409","description":"Pivotal Concourse, most versions prior to 6.0.0, allows redirects to untrusted websites in its login flow. A remote unauthenticated attacker could convince a user to click on a link using the OAuth redirect link with an untrusted website and gain access to that user's access token in Concourse. (This issue is similar to, but distinct from, CVE-2018-15798.)","status":"published","published":"2020-05-14T00:15:11.603Z","modified":"2026-06-17T03:21:26.44Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"3.0","score":7.6,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:06:00.784809Z"}],"osv":[{"id":"CVE-2020-5409","description":"Pivotal Concourse, most versions prior to 6.0.0, allows redirects to untrusted websites in its login flow. A remote unauthenticated attacker could convince a user to click on a link using the OAuth redirect link with an untrusted website and gain access to that user's access token in Concourse. (This issue is similar to, but distinct from, CVE-2018-15798.)","status":"published","published":"2020-05-14T00:15:11.603Z","modified":"2026-10-24T10:30:44.620920088Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:16.936975Z"},{"id":"BIT-concourse-2020-5409","title":"Concourse Open Redirect in the /sky/login endpoint","description":"Pivotal Concourse, most versions prior to 6.0.0, allows redirects to untrusted websites in its login flow. A remote unauthenticated attacker could convince a user to click on a link using the OAuth redirect link with an untrusted website and gain access to that user's access token in Concourse. (This issue is similar to, but distinct from, CVE-2018-15798.)","status":"published","published":"2024-03-06T10:51:15.173Z","modified":"2026-09-10T16:00:43.954669357Z","updated_at":"2026-11-02T15:28:28.70813Z"}]}}