---
id: CVE-2026-81890
title: >-
  elFinder is an open-source file manager for web, written in JavaScript using
  jQuery UI
summary: >-
  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(…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'
cwe:
  - CWE-352
vendor: studio-42
product: studio-42/elfinder
affected:
  - studio-42/elfinder < 2.1.70
patched:
  - studio-42/elfinder 2.1.70
published: '2026-08-31'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:09:13.080'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81890'
references:
  - url: >-
      https://github.com/Studio-42/elFinder/commit/31284facd033e081b2b69c08873b39c8a413b762
    label: security-advisories@github.com
  - url: >-
      https://github.com/Studio-42/elFinder/commit/36d40fff12222ad4c229d8889d8ed3fd3dbf0415
    label: security-advisories@github.com
  - url: 'https://github.com/Studio-42/elFinder/releases/tag/2.1.70'
    label: security-advisories@github.com
  - url: >-
      https://github.com/Studio-42/elFinder/security/advisories/GHSA-9hjf-w35w-6vx2
    label: security-advisories@github.com
  - url: >-
      https://github.com/Studio-42/elFinder/security/advisories/GHSA-9hjf-w35w-6vx2
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81890'
  - url: 'https://github.com/advisories/GHSA-9hjf-w35w-6vx2'
tags:
  - nvd
  - ghsa
  - composer
epss: 0.00177
epssPercentile: 0.06459
aliases:
  - GHSA-9hjf-w35w-6vx2
ecosystem: composer
ingestedAt: '2026-09-02T14:45:30.097Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-81890)

Affected packages:

- `studio-42/elfinder < 2.1.70`

Patched in:

- `studio-42/elfinder 2.1.70`

Source: https://github.com/advisories/GHSA-9hjf-w35w-6vx2