{"id":"CVE-2018-15798","aliases":["GHSA-9689-rx4v-cqgc"],"url":"https://o3.security/vulnerability/CVE-2018-15798","summary":"Pivotal Concourse Open Redirect in Login Flow","details":"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","published":"2018-12-19T22:29:00.547Z","modified":"2026-07-08T16:40:29.485428Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"},"epss":{"score":0.01145,"percentile":0.63819,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/concourse/concourse","fixedVersion":"5.2.8"},{"ecosystem":"Go","name":"github.com/concourse/concourse","fixedVersion":"5.5.10"},{"ecosystem":"Go","name":"github.com/concourse/concourse","fixedVersion":"5.8.1"}],"fix":{"url":"https://github.com/concourse/concourse/pull/5350/commits/38cb4cc025e5ed28764b4adc363a0bbf41f3c7cb","label":"concourse/concourse#5350"},"references":[{"type":"ADVISORY","url":"https://pivotal.io/security/cve-2018-15798"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-15798"},{"type":"WEB","url":"https://github.com/concourse/concourse/pull/5350/commits/38cb4cc025e5ed28764b4adc363a0bbf41f3c7cb"},{"type":"WEB","url":"https://github.com/concourse/concourse/blob/release/5.2.x/release-notes/v5.2.8.md"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T16:40:29.485428Z"}}