Security advisory

{
  "id": "f7fb3b01de6f324d4b770081409a0a268bede24924da0f04463ebc2e99964baf",
  "url": "https://osv.dev/vulnerability/CVE-2021-43177",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-43177",
    "summary": "As a result of an incomplete fix for CVE-2015-7225, in versions of devise-two-factor prior to 4.0.2 it is possible to reuse a One-Time-Password (OTP) for one (and only one) immediately trailing interval. CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N)",
    "evidence": "osv:CVE-2021-43177",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-43177",
      "aliases": [
        "CVE-2021-43177",
        "GHSA-jm35-h8q2-73mp"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/devise-two-factor/devise-two-factor",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1e43084994467e78ec35cac374ec3113aa931aed"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:tinfoilsecurity:devise-two-factor:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.0.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.0.1",
            "v4.0.0",
            "v3.1.0",
            "v3.0.2",
            "v3.0.1",
            "v3.0.0",
            "v2.1.0",
            "v2.0.1",
            "v1.1.0",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43177.json"
          }
        }
      ],
      "modified": "2026-10-20T10:55:02.404445500Z",
      "provider": "osv",
      "references": [
        "https://github.com/tinfoil/devise-two-factor/security/advisories/GHSA-jm35-h8q2-73mp"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-43177",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386761,
  "published_at": "2022-04-11T20:15:16.037+00:00"
}