{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "last_affected": "2.570"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "fixed": "cb4614e8319e0932b10533a4d5606debf5f40e14"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "cb4614e8319e0932b10533a4d5606debf5f40e14"
            }
          ],
          "repo": "https://github.com/webmin/usermin",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123621.json"
  },
  "details": "Usermin through 2.570 contains a path traversal vulnerability in mailbox/detachall.cgi that allows remote unauthenticated attackers to write files outside the temporary directory via unsanitized attachment filenames. Attackers can email attachments with ../ sequences in filenames, and when the recipient downloads all attachments, files like ~/.forward are overwritten, enabling command execution.",
  "id": "CVE-2026-123621",
  "modified": "2026-11-08T02:30:57.738048740Z",
  "published": "2026-11-06T15:00:56.411Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123621.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123621"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/usermin-through-2.570-path-traversal-file-write-via-detachall-cgi"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/webmin/usermin/issues/142"
    },
    {
      "type": "FIX",
      "url": "https://github.com/webmin/usermin/commit/cb4614e8319e0932b10533a4d5606debf5f40e14"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/webmin/usermin"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/webmin/usermin/blob/2.570/mailbox/detachall.cgi#L43-L51"
    },
    {
      "type": "ARTICLE",
      "url": "https://hackmd.io/@leediay/H144QKY6zl"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Usermin through 2.570 Path Traversal File Write via detachall.cgi"
}