What’s Vulnerable › Vulnerabilities

CVE-2026-81890: elFinder: CSRF in netmount allows forced FTP mounts and server-side FTP connections

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-31 · updated 2026-09-09
• Weakness: CWE-352

Description

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.

Affected products

• Studio-42 elFinder: before 2.1.70

References

• https://github.com/Studio-42/elFinder/commit/31284facd033e081b2b69c08873b39c8a413b762
• https://github.com/Studio-42/elFinder/commit/36d40fff12222ad4c229d8889d8ed3fd3dbf0415
• https://github.com/Studio-42/elFinder/releases/tag/2.1.70
• https://github.com/Studio-42/elFinder/security/advisories/GHSA-9hjf-w35w-6vx2
• https://github.com/Studio-42/elFinder/security/advisories/GHSA-9hjf-w35w-6vx2

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