Security advisory

{
  "id": "e0c6cb2f18029ca74b08c0882c6ee1d0d7e1180717cb9642c0b57f1c51787746",
  "url": "https://osv.dev/vulnerability/CVE-2021-33564",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-33564",
    "summary": "An argument injection vulnerability in the Dragonfly gem before 1.4.0 for Ruby allows remote attackers to read and write to arbitrary files via a crafted URL when the verify_url option is disabled. This may lead to code execution. The problem occurs because the generate and process features mishandle use of the ImageMagick convert utility.",
    "evidence": "osv:CVE-2021-33564",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-33564",
      "aliases": [
        "CVE-2021-33564",
        "GHSA-j858-xp5v-f8xx"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/markevans/dragonfly",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "35e88d14987bf425dcace67f9b100d9a23cae904"
                },
                {
                  "fixed": "25399297bb457f7fcf8e3f91e85945b255b111b5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:dragonfly_project:dragonfly:*:*:*:*:*:ruby:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.4.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "25399297bb457f7fcf8e3f91e85945b255b111b5"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.3.0",
            "v1.2.1",
            "v1.2.0",
            "v1.1.5",
            "v1.1.4",
            "v1.1.3",
            "v1.1.2",
            "v1.1.1",
            "v1.1.0",
            "v1.0.12",
            "v1.0.11",
            "v1.0.10",
            "v1.0.9",
            "v1.0.8",
            "v1.0.7",
            "v1.0.6",
            "v1.0.5",
            "v1.0.4",
            "v1.0.3",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0",
            "v0.9.15",
            "v0.9.14",
            "v0.9.13",
            "security_fix",
            "v0.9.12",
            "v0.9.11",
            "v0.9.10",
            "v0.9.9",
            "v0.9.8",
            "v0.9.7",
            "v0.9.6",
            "v0.9.5",
            "v0.9.4",
            "v0.9.3",
            "v0.9.2",
            "v0.9.1",
            "v0.9.0",
            "v0.8.3",
            "v0.8.2",
            "v0.8.1",
            "v0.8.0",
            "v0.7.7",
            "v0.7.6",
            "v0.7.5",
            "v0.7.4",
            "v0.7.3",
            "v0.7.2",
            "v0.7.1",
            "v0.7.0",
            "v0.6.2",
            "v0.6.1",
            "v0.6.0",
            "v0.5.7",
            "v0.5.6",
            "v0.5.5",
            "v0.5.4",
            "v0.5.3",
            "v0.5.2",
            "v0.5.1",
            "v0.5.0",
            "v0.4.4",
            "v0.4.3",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3.8",
            "v0.3.7",
            "v0.3.6",
            "v0.3.5",
            "v0.3.4",
            "v0.3.3",
            "v0.3.2",
            "v0.3.0",
            "v0.2.1",
            "v0.2.0",
            "v0.1.6",
            "v0.1.5",
            "v0.1.4",
            "v0.1.1",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-33564.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:44.688009452Z",
      "provider": "osv",
      "references": [
        "https://github.com/markevans/dragonfly/issues/513",
        "https://github.com/markevans/dragonfly/commit/25399297bb457f7fcf8e3f91e85945b255b111b5",
        "https://github.com/markevans/dragonfly/compare/v1.3.0...v1.4.0",
        "https://github.com/mlr0p/CVE-2021-33564",
        "https://raw.githubusercontent.com/projectdiscovery/nuclei-templates/master/cves/2021/CVE-2021-33564.yaml",
        "https://zxsecurity.co.nz/research/argunment-injection-ruby-dragonfly/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-33564",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386054,
  "published_at": "2021-05-29T14:15:08.51+00:00"
}