Security advisory

{
  "id": "656a95db364eeaee91db3a57997cd470e1bd8e53012572b5ecbcb16d6f860b80",
  "url": "https://osv.dev/vulnerability/CVE-2018-15798",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-15798",
    "summary": "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.",
    "evidence": "osv:CVE-2018-15798",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-15798",
      "aliases": [
        "CVE-2018-15798",
        "GHSA-9689-rx4v-cqgc"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/concourse/concourse",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7577eba5fe060e8239070b4a26cab1d89e266b7c"
                },
                {
                  "fixed": "a48dbfa07c3ff6940d4f9de021338101f842c3c9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.0.0"
                      },
                      {
                        "fixed": "4.2.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.2.1",
            "v4.2.0",
            "v4.1.0",
            "v4.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-15798.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:46.420600694Z",
      "provider": "osv",
      "references": [
        "https://pivotal.io/security/cve-2018-15798"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-15798",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 436328,
  "published_at": "2018-12-19T22:29:00.547+00:00"
}