CVE-2021-24164

Ninja Forms <= 3.4.34 - Authenticated OAuth Connection Key Disclosure

2021-02-16 00:00

Strategic Overview

Status: Patched in 3.4.34.1
Affected Plugin: Ninja Forms – The Contact Form Builder That Grows With You
Affected Version: < 3.4.34.1
CVSS: 4.3Medium
Weakness type: CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
CVE: CVE-2021-24164

View all Ninja Forms – The Contact Form Builder That Grows With You vulnerabilities

At a glance

CVE-2021-24164 is a medium-severity Exposure of Sensitive Information to an Unauthorized Actor vulnerability in the Ninja Forms WordPress plugin, affecting versions < 3.4.34.1. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account. The issue is fixed in version 3.4.34.1; sites on affected versions should update now. Disclosed February 2021, reported by Chloe Chamberland.

Vulnerability Overview

In the Ninja Forms Contact Form WordPress plugin before 3.4.34.1, low-level users, such as subscribers, were able to trigger the action, wp_ajax_nf_oauth, and retrieve the connection url needed to establish a connection. They could also retrieve the client_id for an already established OAuth connection.

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.

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Reaching this weakness in Ninja Forms < 3.4.34.1 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 3.4.34.1: builds < 3.4.34.1 are affected, anything from 3.4.34.1 onward is not.

Remediation

Update to version 3.4.34.1, or a newer patched version

How does WordSec protect against this?

The fix is the thing that ends this: Ninja Forms 3.4.34.1 closes this, and updating the plugin is the step that ends it.

Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24164 https://www.wordfence.com/threat-intel/vulnerabilities/id/6b7ad031-e15b-4315-9905-9f258f7c4ade https://nvd.nist.gov/vuln/detail/CVE-2021-24164

Related records

Same weakness class

Other vulnerabilities in Ninja Forms – The Contact Form Builder That Grows With You

CVSS Vector

4.3

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

This record contains material that is subject to copyright

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

https://www.cve.org/Legal/TermsOfUse

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/