CVE-2021-24163

Ninja Forms Contact Form <= 3.4.33 - Authenticated SendWP Plugin Installation and Client Secret Key Disclosure

2021-02-16 00:00
Chloe Chamberland

Strategic Overview

Status
Patched in 3.4.34
Affected Plugin
Ninja Forms – The Contact Form Builder That Grows With You
Affected Version
< 3.4.34
CVSS
8.8High
Weakness type
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
CVE
CVE-2021-24163
View all Ninja Forms – The Contact Form Builder That Grows With You vulnerabilities

At a glance

CVE-2021-24163 is a high-severity Exposure of Sensitive Information to an Unauthorized Actor vulnerability in the Ninja Forms WordPress plugin, affecting versions < 3.4.34. 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. The issue is fixed in version 3.4.34; sites on affected versions should update now. Disclosed February 2021, reported by Chloe Chamberland.

Vulnerability Overview

The AJAX action, wp_ajax_ninja_forms_sendwp_remote_install_handler, did not have a capability check on it, nor did it have any nonce protection, therefore making it possible for low-level users, such as subscribers, to install and activate the SendWP Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress WordPress plugin before 3.4.34 and retrieve the client_secret key needed to establish the SendWP connection while also installing the SendWP plugin.

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-200: Exposure of Sensitive Information to an Unauthorized Actor

Reaching this weakness in Ninja Forms < 3.4.34 takes any authenticated account. Sensitive information exposure means data the application intended to keep internal is returned to a caller who should not be able to see it.

The disclosed data — credentials, tokens, customer records or internal paths — is usually worth more as material for a follow-up attack than as an end in itself. For Ninja Forms the fix is 3.4.34: builds < 3.4.34 are affected, anything from 3.4.34 onward is not.

Remediation

Update to version 3.4.34, or a newer patched version

How does WordSec protect against this?

The fix is the thing that ends this: Ninja Forms 3.4.34 closes this, and updating the plugin is the step that ends it.

  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24163https://www.wordfence.com/threat-intel/vulnerabilities/id/25b94c05-87c5-44fb-90d5-6c65d035dba6https://nvd.nist.gov/vuln/detail/CVE-2021-24163

Related records

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