Security advisory

{
  "id": "be5430700881c6bac07cfa72059961bf3981fd1119d92b66a1a1d86bf7bd7e63",
  "url": "https://osv.dev/vulnerability/CVE-2021-20671",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-20671",
    "summary": "Invalid file validation on the upload feature in GROWI versions v4.2.2 allows a remote attacker with administrative privilege to overwrite the files on the server, which may lead to arbitrary code execution.",
    "evidence": "osv:CVE-2021-20671",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-20671",
      "aliases": [
        "CVE-2021-20671"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/growilabs/growi",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5541c34604a7fe1403b32a4aeb1e57efde58b997"
                },
                {
                  "last_affected": "5541c34604a7fe1403b32a4aeb1e57efde58b997"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:weseek:growi:4.2.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.2.2"
                      },
                      {
                        "last_affected": "4.2.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.2.2",
            "v4.2.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20671.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:21.974489005Z",
      "provider": "osv",
      "references": [
        "https://jvn.jp/en/vu/JVNVU94889258/index.html",
        "https://weseek.co.jp/security/2021/03/08/vulnerability/growi-prevent-multiple-xss/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-20671",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430596,
  "published_at": "2021-03-10T10:15:12.88+00:00"
}