PT-2022-11833 · Studio 42 · Elfinder

Ph33R · Published 2022-04-07 · Updated 2022-04-13 · CVE-2021-43421

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Studio-42 elFinder versions 2.0.4 through 2.1.59

Description A File Upload issue exists via the connector.minimal.php file, allowing a remote malicious user to upload arbitrary files and execute PHP code.

Recommendations For versions 2.0.4 through 2.1.59, consider disabling the connector.minimal.php file as a temporary workaround to prevent exploitation. Restrict access to this file to minimize the risk of uploading and executing malicious PHP code. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2021-43421

GHSA-X4JX-HJWF-GC99

Affected Products

Elfinder

References · 9

• 🔥 https://github.com/Studio-42/elFinder/issues/3429 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-43421 · Security Note
• https://osv.dev/vulnerability/GHSA-x4jx-hjwf-gc99 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-43421 · Vendor Advisory
• https://github.com/Studio-42/elFinder · Note
• https://github.com/Studio-42/elFinder/commit/c08bcbfa722d758d01975799b7036951eb5d33cb · Note
• https://t.me/cvenotify/28593 · Telegram Post
• https://t.me/cvenotify/28876 · Telegram Post
• https://twitter.com/infosec_90/status/1455180286354919425 · Note