CVE-2026-81890
MediumCVSS 5.4Summary
elFinder before version 2.1.70 does not protect the netmount command against CSRF attacks because it is not included in the list of protected commands. In the default configuration, FTP network mounts are enabled, and an attacker can control parameters such as protocol, host, port, user, password, allowing persistent mounting of an attacker-chosen FTP server in the victim's session and sending credentials without a CSRF token.
Risk Assessment
An attacker can use the victim's session to connect to a chosen FTP server, potentially leading to data leakage or using the server for further attacks.
Recommendation
Update elFinder to version 2.1.70 or later, which includes a fix adding CSRF validation for the netmount command.
Other vulnerabilities in elFinder
See all- CVE-2026-81891High
In elFinder (a web file manager) before version 2.1.70, there is a vulnerability that allows bypassing file type restrictions during archive extraction. The checkExtractItems() function does not normalize the MIME type, so files with extensions .phtml, .phar, .php5, and .php3 can be extracted even if uploadDeny blocks text/x-php. An attacker with ZIP upload permission can place PHP files in a web-accessible directory and achieve remote code execution. The issue is fixed in version 2.1.70.
- CVE-2026-81889High
In elFinder before version 2.1.70, there is a Server-Side Request Forgery (SSRF) vulnerability during URL uploads. When PHP cURL is unavailable, IP validation can be bypassed via DNS rebinding, allowing connections to internal addresses. Additionally, even when using cURL, there is a blind SSRF path. The issue is fixed in version 2.1.70.
- CVE-2024-38909Critical
Studio 42 elFinder version 2.1.64 is vulnerable to incorrect access control. Copying files with an unauthorized extension between server directories allows an attacker to expose secrets and perform remote code execution (RCE).
Original NVD description (English source)
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.