Security advisory

{
  "id": "6b72db9ee090bb9d211f16c855023bc7932fb55b7e62e652de9ca763b07f3285",
  "url": "https://osv.dev/vulnerability/CVE-2018-20745",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-20745",
    "summary": "Yii 2.x through 2.0.15.1 actively converts a wildcard CORS policy into reflecting an arbitrary Origin header value, which is incompatible with the CORS security design, and could lead to CORS misconfiguration security problems.",
    "evidence": "osv:CVE-2018-20745",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-20745",
      "aliases": [
        "CVE-2018-20745",
        "GHSA-cr6r-6xm9-ww22"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/yiisoft/yii2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ae8d9782707b89315194ec70a139fece122b8977"
                },
                {
                  "last_affected": "20aa5080189cbacd4180d3b115752817921eb364"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:yiiframework:yii:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.0"
                      },
                      {
                        "last_affected": "2.0.15.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20745.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:06.813567017Z",
      "provider": "osv",
      "references": [
        "https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-chen.pdf",
        "https://github.com/yiisoft/yii2/issues/16193"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-20745",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381297,
  "published_at": "2019-01-28T08:29:00.527+00:00"
}