RCE in Std42 Elfinder

CVE-2026-41247

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.

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.027 (85.1th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-41247: rose from 0.016 to 0.027.

EPSS over last 30 days · oldest: 0.016 · newest: 0.027 · change: +0.011

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-41247?
CVE-2026-41247 is a critical-severity vulnerability in Std42 Elfinder, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-04-23.
How severe is CVE-2026-41247?
Critical severity. CVSS v3 base score is 9.8 out of 10.