Security advisory

{
  "id": "de96d695a85f4eaa31626fa981751f3deea155b239ea8655ab4527d36916d368",
  "url": "https://osv.dev/vulnerability/CVE-2022-42731",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2022-42731",
    "summary": "mfa/FIDO2.py in django-mfa2 before 2.5.1 and 2.6.x before 2.6.1 allows a replay attack that could be used to register another device for a user. The device registration challenge is not invalidated after usage.",
    "evidence": "osv:CVE-2022-42731",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-42731",
      "aliases": [
        "CVE-2022-42731",
        "GHSA-vw39-2wj9-4q86",
        "PYSEC-2022-303"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mkalioby/django-mfa2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4b19d95a7eafc1f64ec03f18804b801b0ab00537"
                },
                {
                  "fixed": "84b9d297d21170eab89b73dcb25f9ea7dcc64b82"
                },
                {
                  "introduced": "4903967c23e7dc515090c26bcacec2b64d8dbe9d"
                },
                {
                  "fixed": "2d7b80bf5a7b67816dbf57af2b7ae33347b24d5f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2"
                      },
                      {
                        "fixed": "2.5.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.6.x"
                      },
                      {
                        "fixed": "2.6.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  },
                  {
                    "range": [
                      {
                        "fixed": "84b9d297d21170eab89b73dcb25f9ea7dcc64b82"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.5.1-release"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2d7b80bf5a7b67816dbf57af2b7ae33347b24d5f"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.6.1-release"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.6.0-release",
            "v2.4.0",
            "v2.3.0",
            "v2.2.0",
            "v2.0.5",
            "v2.0.3",
            "v2.0.1",
            "v2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-42731.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.196841817Z",
      "provider": "osv",
      "references": [
        "https://github.com/mkalioby/django-mfa2/blob/0936ea253354dd95cb127f09d0efa31324caef27/mfa/FIDO2.py#L58",
        "https://github.com/mkalioby/django-mfa2/releases/tag/v2.5.1-release",
        "https://github.com/mkalioby/django-mfa2/releases/tag/v2.6.1-release",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/42xxx/CVE-2022-42731.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-42731"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/42xxx/CVE-2022-42731.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-42731",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517372,
  "published_at": "2022-10-11T00:00:00+00:00"
}