Security advisory

{
  "id": "8cc100200a4a9f383b1a06f9e0346d4fcaf17de4d0ef3057cf7525631ed2d967",
  "url": "https://osv.dev/vulnerability/CVE-2021-3689",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3689",
    "summary": "yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator",
    "evidence": "osv:CVE-2021-3689",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-3689",
      "aliases": [
        "CVE-2021-3689",
        "GHSA-hq3v-rg6f-6hx4"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/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"
                },
                {
                  "fixed": "540a9011af08ab9843a50e4d14141724a4610b9b"
                },
                {
                  "fixed": "13f27e4d920a05d53236139e8b07007acd046a46"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:yiiframework:yii:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "fixed": "2.0.43"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "13f27e4d920a05d53236139e8b07007acd046a46"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3689.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:48.717835614Z",
      "provider": "osv",
      "references": [
        "https://github.com/yiisoft/yii2/commit/13f27e4d920a05d53236139e8b07007acd046a46",
        "https://huntr.dev/bounties/50aad1d4-eb00-4573-b8a4-dbe38e2c229f"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-3689",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386179,
  "published_at": "2021-08-10T11:15:09.64+00:00"
}