{"id":"CVE-2018-15798","aliases":["EUVD-2022-0931","GHSA-9689-rx4v-cqgc"],"status":"published","title":"Pivotal Concourse allows malicious redirect urls on login","description":"Pivotal Concourse Release, versions 4.x prior to 4.2.2, login flow allows redirects to untrusted websites. 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.","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":"2026-11-08","score":0.01145,"percentile":0.66954,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-601"],"published":"2018-12-19T22:00:00Z","modified":"2026-10-24T10:30:46Z","fixes":[{"ecosystem":"Go","package":"github.com/concourse/concourse","fixed_in":["5.2.8","5.5.10","5.8.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/concourse/concourse","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.2.8"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/concourse/concourse","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.3.0"},{"fixed":"5.5.10"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/concourse/concourse","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.6.0"},{"fixed":"5.8.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/concourse/concourse","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.2.8"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/concourse/concourse","ranges":[{"type":"SEMVER","events":[{"introduced":"5.3.0"},{"fixed":"5.5.10"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/concourse/concourse","ranges":[{"type":"SEMVER","events":[{"introduced":"5.6.0"},{"fixed":"5.8.1"}]}]}],"products":[{"vendor":"pivotal","product":"concourse"},{"vendor":"pivotal_software","product":"concourse"}],"references":[{"url":"https://pivotal.io/security/cve-2018-15798","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-15798","tags":["advisory"]},{"url":"https://github.com/concourse/concourse/pull/5350/commits/38cb4cc025e5ed28764b4adc363a0bbf41f3c7cb","tags":["web"]},{"url":"https://github.com/concourse/concourse/blob/release/5.2.x/release-notes/v5.2.8.md","tags":["web"]},{"url":"https://github.com/advisories/GHSA-9689-rx4v-cqgc"}],"sources":{"cve":[{"id":"CVE-2018-15798","title":"Pivotal Concourse allows malicious redirect urls on login","description":"Pivotal Concourse Release, versions 4.x prior to 4.2.2, login flow allows redirects to untrusted websites. 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.","status":"published","published":"2018-12-19T22:00:00Z","modified":"2024-09-17T03:18:08.124Z","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"}],"updated_at":"2026-11-02T14:35:03.825765Z"}],"euvd":[{"id":"EUVD-2022-0931","description":"Pivotal Concourse Release, versions 4.x prior to 4.2.2, login flow allows redirects to untrusted websites. 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.","status":"published","published":"2018-12-19T22:00:00Z","modified":"2024-09-17T03:18:08Z","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":"2026-11-03T00:28:32.883624Z"}],"ghsa":[{"id":"GHSA-9689-rx4v-cqgc","title":"Pivotal Concourse Open Redirect in Login Flow","description":"Pivotal Concourse Release, versions 4.x prior to 4.2.2, login flow allows redirects to untrusted websites. 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.\n\n### Specific Go Packages Affected\ngithub.com/concourse/concourse/skymarshal/skyserver","status":"published","published":"2022-02-15T01:57:18Z","modified":"2023-10-02T11:43:17Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:37:06.913882Z"}],"nvd":[{"id":"CVE-2018-15798","description":"Pivotal Concourse Release, versions 4.x prior to 4.2.2, login flow allows redirects to untrusted websites. 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.","status":"published","published":"2018-12-19T22:29:00.547Z","modified":"2026-06-17T01:43:07.413Z","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":"secondary"},{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"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":"2026-11-02T14:04:50.99633Z"}],"osv":[{"id":"CVE-2018-15798","description":"Pivotal Concourse Release, versions 4.x prior to 4.2.2, login flow allows redirects to untrusted websites. 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.","status":"published","published":"2018-12-19T22:29:00.547Z","modified":"2026-10-24T10:30:46.420600694Z","cvss":[{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:08.242347Z"},{"id":"GHSA-9689-rx4v-cqgc","title":"Pivotal Concourse Open Redirect in Login Flow","description":"Pivotal Concourse Release, versions 4.x prior to 4.2.2, login flow allows redirects to untrusted websites. 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.\n\n### Specific Go Packages Affected\ngithub.com/concourse/concourse/skymarshal/skyserver","status":"published","published":"2022-02-15T01:57:18Z","modified":"2023-11-08T03:59:58.353225Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T15:46:43.123867Z"}]}}