CVE-2022-0889

Ninja Forms - File Uploads Extension <= 3.3.12 - Reflected Cross-Site Scripting

2021-11-20 00:00
Nuno Correia (Blaze Security)

Strategic Overview

Status
Patched in 3.3.13
Affected Plugin
Ninja Forms - File Uploads
Affected Version
<= 3.3.12
CVSS
7.2High
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2022-0889
View all Ninja Forms - File Uploads vulnerabilities

At a glance

CVE-2022-0889 is a high-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Ninja Forms - File Uploads WordPress plugin, affecting versions <= 3.3.12. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.3.13; sites on affected versions should update now. Disclosed November 2021, reported by Nuno Correia (Blaze Security).

Vulnerability Overview

The Ninja Forms - File Uploads Extension WordPress plugin is vulnerable to reflected cross-site scripting due to missing sanitization of the files filename parameter found in the ~/includes/ajax/controllers/uploads.php file which can be used by unauthenticated attackers to add malicious web scripts to vulnerable WordPress sites, in versions up to and including 3.3.12.

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.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Ninja Forms - File Uploads <= 3.3.12 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Ninja Forms - File Uploads the fix is 3.3.13: builds <= 3.3.12 are affected, anything from 3.3.13 onward is not.

Remediation

Update to version 3.3.13, 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. None of that substitutes for the fix: Ninja Forms - File Uploads 3.3.13 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-0889https://www.wordfence.com/threat-intel/vulnerabilities/id/8c5642fa-d001-47c4-8acd-94ae944e5129https://nvd.nist.gov/vuln/detail/CVE-2022-0889

Related records

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