{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.2.2"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "5541c34604a7fe1403b32a4aeb1e57efde58b997"
            }
          ],
          "repo": "https://github.com/weseek/growi",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "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.",
  "id": "CVE-2021-20671",
  "modified": "2026-03-14T13:50:04.161095010Z",
  "published": "2021-03-10T10:15:12.880Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://jvn.jp/en/vu/JVNVU94889258/index.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://weseek.co.jp/security/2021/03/08/vulnerability/growi-prevent-multiple-xss/"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}