Security advisory

{
  "id": "6dc3b4cd35388dc3ce68df6801d92fecafe16081724d41109f86dc32403e76a7",
  "url": "https://osv.dev/vulnerability/CVE-2020-12666",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-12666",
    "summary": "macaron before 1.3.7 has an open redirect in the static handler, as demonstrated by the http://127.0.0.1:4000//example.com/ URL.",
    "evidence": "osv:CVE-2020-12666",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-12666",
      "aliases": [
        "CVE-2020-12666",
        "GHSA-733f-44f3-3frw",
        "GO-2020-0039"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/go-macaron/macaron",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "addc7461c3a90a040e79aa75bfd245107a210245"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:go-macaron:macaron:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.3.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "addc7461c3a90a040e79aa75bfd245107a210245"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.3.7"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.3.6",
            "v1.3.5",
            "v1.3.4",
            "v1.3.3",
            "v1.3.2",
            "v1.3.1",
            "v1.3.0",
            "v1.2.4",
            "v1.2.3",
            "v1.2.2",
            "v1.2.1",
            "v1.2.0",
            "v1.1.12",
            "v1.1.11",
            "v1.1.10",
            "v1.1.9",
            "v1.1.8",
            "v1.1.7",
            "v1.1.6",
            "v1.1.5",
            "v1.1.3",
            "v1.1.2",
            "v1.1.1",
            "v1.1.0",
            "v1.0.1",
            "v1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-12666.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:46.636963934Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QEUOHRC4EN4WZ66EVFML2UCV7ZQ63XZ/",
        "https://github.com/go-macaron/macaron/releases/tag/v1.3.7",
        "https://github.com/go-macaron/macaron/issues/198"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "32"
                  },
                  {
                    "last_affected": "32"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-12666",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382926,
  "published_at": "2020-05-05T22:15:13.027+00:00"
}