{"id":"CVE-2026-81890","aliases":["GHSA-9hjf-w35w-6vx2"],"url":"https://o3.security/vulnerability/CVE-2026-81890","summary":"elFinder: CSRF in netmount allows forced FTP mounts and server-side FTP connections","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.","published":"2026-08-31T20:29:43.695Z","modified":"2026-09-03T03:30:29.808747415Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"},"epss":{"score":0.00153,"percentile":0.04716,"asOf":"2026-09-03"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"studio-42/elfinder","fixedVersion":"2.1.70"}],"fix":{"url":"https://github.com/Studio-42/elFinder/commit/31284facd033e081b2b69c08873b39c8a413b762","label":"Studio-42/elFinder@31284fa"},"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-03T03:30:29.808747415Z"}}