CVE-2022-40200

wpForo Forum <= 2.0.9 - Authenticated (Subscriber+) Arbitrary File Upload

2022-11-09 00:00
Rafie Muhammad

Strategic Overview

Status
Patched in 2.1.0
Affected Plugin
wpForo Forum
Affected Version
<= 2.0.9
CVSS
8.8High
Weakness type
CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE
CVE-2022-40200
View all wpForo Forum vulnerabilities

At a glance

CVE-2022-40200 is a high-severity Unrestricted Upload of File with Dangerous Type vulnerability in the wpForo Forum WordPress plugin, affecting versions <= 2.0.9. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 2.1.0; sites on affected versions should update now. Disclosed November 2022, reported by Rafie Muhammad.

Vulnerability Overview

The wpForo Forum plugin for WordPress is vulnerable to arbitrary file uploads due to missing protections or file validations in versions up to, and including, 2.0.9. This makes it possible for authenticated attackers, with minimal permissions, to upload arbitrary files on the affected sites server which may make remote code execution possible.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-434: Unrestricted Upload of File with Dangerous Type

Reaching this weakness in wpForo Forum <= 2.0.9 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 wpForo Forum the fix is 2.1.0: builds <= 2.0.9 are affected, anything from 2.1.0 onward is not.

Remediation

Update to version 2.1.0, 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: wpForo Forum 2.1.0 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-40200https://www.wordfence.com/threat-intel/vulnerabilities/id/07c01ab7-8bf8-4aa5-b5e6-8e47a3bf1f7chttps://nvd.nist.gov/vuln/detail/CVE-2022-40200

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C