CVE-2022-0888

Ninja Forms - File Uploads Extension <= 3.3.0 - Arbitrary File Upload

2020-03-20 00:00
Muhammad Zeeshan (Xib3rR4dAr)

Strategic Overview

Status
Patched in 3.3.1
Affected Plugin
Ninja Forms - File Uploads
Affected Version
<= 3.3.0
CVSS
9.8Critical
Weakness type
CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE
CVE-2022-0888
View all Ninja Forms - File Uploads vulnerabilities

At a glance

CVE-2022-0888 is a critical-severity Unrestricted Upload of File with Dangerous Type vulnerability in the Ninja Forms - File Uploads WordPress plugin, affecting versions <= 3.3.0. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 3.3.1; sites on affected versions should update now. Disclosed March 2020, reported by Muhammad Zeeshan (Xib3rR4dAr).

Vulnerability Overview

The Ninja Forms - File Uploads Extension WordPress plugin is vulnerable to arbitrary file uploads due to insufficient input file type validation found in the ~/includes/ajax/controllers/uploads.php file which can be bypassed making it possible for unauthenticated attackers to upload malicious files that can be used to obtain remote code execution, in versions up to and including 3.3.0

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 privileges on the target site, 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 Ninja Forms - File Uploads <= 3.3.0 takes a caller who can reach the endpoint. 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 Ninja Forms - File Uploads the fix is 3.3.1: builds <= 3.3.0 are affected, anything from 3.3.1 onward is not.

Remediation

Update to version 3.3.1, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Ninja Forms - File Uploads: 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: Ninja Forms - File Uploads 3.3.1 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-0888https://www.wordfence.com/threat-intel/vulnerabilities/id/f00eeaef-f277-481f-9e18-bf1ced0015a0https://nvd.nist.gov/vuln/detail/CVE-2022-0888

Related records

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