{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.1.70"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "31284facd033e081b2b69c08873b39c8a413b762"
            },
            {
              "fixed": "36d40fff12222ad4c229d8889d8ed3fd3dbf0415"
            },
            {
              "fixed": "e7ea668fd569fc9903fb1c431d47d58f2daad2f2"
            }
          ],
          "repo": "https://github.com/studio-42/elfinder",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9hjf-w35w-6vx2"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-352"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81890.json"
  },
  "details": "elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, the netmount command is omitted from elFinderConnector::$csrfProtectedCmds in php/elFinderConnector.class.php, so validateCsrfToken() is not called for this state-changing operation. In the shipped php/connector.minimal.php-dist configuration, FTP network mounts are enabled by default, and attacker-controlled protocol, host, path, port, user, pass, alias, and options arguments flow through elFinder::netmount() in php/elFinder.class.php to php/elFinderVolumeFTP.class.php. A cross-site request can therefore persist an attacker-chosen FTP mount in the victim's session, cause the PHP server to connect to an attacker-chosen FTP host and port, and send supplied credentials without an X-elFinder-CSRF token. This issue is fixed in version 2.1.70.",
  "id": "CVE-2026-81890",
  "modified": "2026-09-02T03:31:00.761510578Z",
  "published": "2026-08-31T20:29:43.695Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Studio-42/elFinder/releases/tag/2.1.70"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81890.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Studio-42/elFinder/security/advisories/GHSA-9hjf-w35w-6vx2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81890"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Studio-42/elFinder/commit/31284facd033e081b2b69c08873b39c8a413b762"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Studio-42/elFinder/commit/36d40fff12222ad4c229d8889d8ed3fd3dbf0415"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "elFinder: CSRF in netmount allows forced FTP mounts and server-side FTP connections"
}