What is CVE-2021-34648?

CVE-2021-34648 is a vulnerability in the Ninja Forms WordPress plugin that allows authenticated attackers to send arbitrary emails from the affected server.

How severe is CVE-2021-34648?

CVE-2021-34648 has a severity rating of 4.3 out of 10.

How does CVE-2021-34648 affect the Ninja Forms plugin?

CVE-2021-34648 affects the Ninja Forms plugin versions up to and including 3.5.7.

How can attackers exploit CVE-2021-34648?

Attackers can exploit CVE-2021-34648 by using the trigger_email_action function in the ~/includes/Routes/Submissions.php file to send arbitrary emails.

Is there a fix available for CVE-2021-34648?

Yes, a fix for CVE-2021-34648 is available. It is recommended to update the Ninja Forms plugin to a version beyond 3.5.7 to mitigate the vulnerability.

Vulnerability/
CVE-2021-34648

medium

6.4

CWE

862 863

22/9/2021

16/9/2024

CVE-2021-34648: Ninja Forms <= 3.5.7 Unprotected REST-API to Email Injection

First published: Wed Sep 22 2021(Updated: )

The Ninja Forms WordPress plugin is vulnerable to arbitrary email sending via the trigger_email_action function found in the ~/includes/Routes/Submissions.php file, in versions up to and including 3.5.7. This allows authenticated attackers to send arbitrary emails from the affected server via the /ninja-forms-submissions/email-action REST API which can be used to socially engineer victims.

Credit: security@wordfence.com

Affected Software	Affected Version	How to fix
Ninja Forms	<=3.5.7

Remedy

https://plugins.trac.wordpress.org/browser/ninja-forms/trunk/includes/Routes/Submissions.php?rev=2543837#L155

Remedy

Update to version 3.5.8 or newer.

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Reference Links

Frequently Asked Questions

What is CVE-2021-34648?
CVE-2021-34648 is a vulnerability in the Ninja Forms WordPress plugin that allows authenticated attackers to send arbitrary emails from the affected server.
How severe is CVE-2021-34648?
CVE-2021-34648 has a severity rating of 4.3 out of 10.
How does CVE-2021-34648 affect the Ninja Forms plugin?
CVE-2021-34648 affects the Ninja Forms plugin versions up to and including 3.5.7.
How can attackers exploit CVE-2021-34648?
Attackers can exploit CVE-2021-34648 by using the trigger_email_action function in the ~/includes/Routes/Submissions.php file to send arbitrary emails.
Is there a fix available for CVE-2021-34648?
Yes, a fix for CVE-2021-34648 is available. It is recommended to update the Ninja Forms plugin to a version beyond 3.5.7 to mitigate the vulnerability.

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