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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-81890
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-31 21:17:52 UTC
Updated2026-09-01 14:17:43 UTC
DescriptionelFinder 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.

Risk And Classification

Primary CVSS: v3.1 5.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS: 0.001530000 probability, percentile 0.047240000 (date 2026-09-01)

Problem Types: CWE-352 | CWE-352 CWE-352: Cross-Site Request Forgery (CSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
3.1CNADECLARED5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Studio-42 ElFinder affected < 2.1.70 Not specified

References

ReferenceSourceLinkTags
github.com/Studio-42/elFinder/security/advisories/GHSA-9hjf-w35w-6vx2 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/Studio-42/elFinder/releases/tag/2.1.70 [email protected] github.com
github.com/Studio-42/elFinder/commit/36d40fff12222ad4c229d8889d8ed3fd3db... [email protected] github.com
github.com/Studio-42/elFinder/commit/31284facd033e081b2b69c08873b39c8a41... [email protected] github.com
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