Security advisory

{
  "id": "82b6b7404da12a4ab45a09fe8510d473e9e71a46a31c721e0fe4e511d0dfffb8",
  "url": "https://osv.dev/vulnerability/CVE-2021-21288",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-21288",
    "summary": "CarrierWave is an open-source RubyGem which provides a simple and flexible way to upload files from Ruby applications. In CarrierWave before versions 1.3.2 and 2.1.1 the download feature has an SSRF vulnerability, allowing attacks to provide DNS entries or IP addresses that are intended for internal use and gather information about the Intranet infrastructure of the platform. This is fixed in versions 1.3.2 and 2.1.1.",
    "evidence": "osv:CVE-2021-21288",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-21288",
      "aliases": [
        "CVE-2021-21288",
        "GHSA-fwcm-636p-68r5"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/carrierwaveuploader/carrierwave",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "56f39b23d16431a79faf8e361d4ee08238db2f66"
                },
                {
                  "introduced": "e1c3eea981ad3963bf5bf5af586286abd1252caa"
                },
                {
                  "fixed": "003e2ceeaa856f2605cf8096b401e76168ffc8ba"
                },
                {
                  "fixed": "012702eb3ba1663452aa025831caa304d1a665c0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:carrierwave_project:carrierwave:*:*:*:*:*:ruby:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.3.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:carrierwave_project:carrierwave:*:*:*:*:*:ruby:*:*",
                    "range": [
                      {
                        "introduced": "2.0.1"
                      },
                      {
                        "fixed": "2.1.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "012702eb3ba1663452aa025831caa304d1a665c0"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.1.0",
            "v2.0.2",
            "v2.0.1",
            "v1.3.1",
            "v1.3.0",
            "v1.2.3",
            "v1.2.2",
            "v1.2.1",
            "v1.2.0",
            "v1.1.0",
            "v1.0.0",
            "v1.0.0.rc",
            "v1.0.0.beta",
            "v0.8.0",
            "v0.7.1",
            "v0.7.0",
            "v0.6.2",
            "v0.6.1",
            "v0.6.0",
            "v0.5.8",
            "v0.5.6",
            "v0.5.5",
            "v0.5.3",
            "v0.5.1",
            "v0.5.0",
            "v0.5.0.beta2",
            "v0.4.5",
            "v0.4.3",
            "v0.4.2",
            "v0.3.5",
            "v0.3.4",
            "v0.3.3",
            "v0.3.2",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21288.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:39.130395081Z",
      "provider": "osv",
      "references": [
        "https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#132---2021-02-08",
        "https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#211---2021-02-08",
        "https://github.com/carrierwaveuploader/carrierwave/security/advisories/GHSA-fwcm-636p-68r5",
        "https://rubygems.org/gems/carrierwave/",
        "https://github.com/carrierwaveuploader/carrierwave/commit/012702eb3ba1663452aa025831caa304d1a665c0"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-21288",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384461,
  "published_at": "2021-02-08T20:15:12.277+00:00"
}