CVE-2026-81890elFinder: CSRF in netmount allows forced FTP mounts and server-side FTP connections
Updated under an hour ago ()
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It affects Studio-42 elFinder. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-352
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Sep 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Studio-42 elFinder studio_42:elfinder (from the name) | before 2.1.70 | CNA record |
References
- https://github.com/Studio-42/elFinder/security/advisories/GHSA-9hjf-w35w-6vx2x-refsource-confirm
- https://github.com/Studio-42/elFinder/commit/31284facd033e081b2b69c08873b39c8a413b762x-refsource-misc
- https://github.com/Studio-42/elFinder/commit/36d40fff12222ad4c229d8889d8ed3fd3dbf0415x-refsource-misc
- https://github.com/Studio-42/elFinder/releases/tag/2.1.70x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.