CVE-2024-8743

Bit File Manager – 100% Free & Open Source File Manager and Code Editor for WordPress <= 6.5.7 - Authenticated (Subscriber+) Limited JavaScript File Upload

2024-10-04 00:00
TANG Cheuk Hei (siunam)

Strategic Overview

Status
Patched in 6.5.8
Affected Plugin
File Manager
Affected Version
<= 6.5.7
CVSS
6.8Medium
Weakness type
CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE
CVE-2024-8743
View all File Manager vulnerabilities

At a glance

CVE-2024-8743 is a medium-severity Unrestricted Upload of File with Dangerous Type vulnerability in the File Manager WordPress plugin, affecting versions <= 6.5.7. It carries a CVSS score of 6.8 (reachable over the network; high confidentiality, integrity impact). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 6.5.8; sites on affected versions should update now. Disclosed October 2024, reported by TANG Cheuk Hei (siunam).

Vulnerability Overview

The Bit File Manager – 100% Free & Open Source File Manager and Code Editor for WordPress plugin for WordPress is vulnerable to Limited JavaScript File Upload in all versions up to, and including, 6.5.7. This is due to a lack of proper checks on allowed file types. This makes it possible for authenticated attackers, with Subscriber-level access and above, and granted permissions by an administrator, to upload .css and .js files, which could lead to Stored Cross-Site Scripting.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity.

CWE-434: Unrestricted Upload of File with Dangerous Type

Reaching this weakness in File Manager <= 6.5.7 takes an account at Subscriber level or above. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.

If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For File Manager the fix is 6.5.8: builds <= 6.5.7 are affected, anything from 6.5.8 onward is not.

Remediation

Update to version 6.5.8, or a newer patched version

How does WordSec protect against this?

An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: File Manager 6.5.8 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2024-8743https://www.wordfence.com/threat-intel/vulnerabilities/id/314520d5-bd9d-46c1-b903-5e5cb3bb3417https://nvd.nist.gov/vuln/detail/CVE-2024-8743

Related records

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