This article is a part of our Vulnerability Database (back to index)
Cross-Site Request Forgery occurrences in Ninja Forms
The wp_ajax_nf_oauth_disconnect from the Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress WordPress plugin before 3.4.34 had no nonce protection making it possible for attackers to craft a request to disconnect a site's OAuth connection. (2021-04-05, CVE-2021-24166)
The Ninja Forms plugin before 3.4.27.1 for WordPress allows CSRF via services integration. (2021-01-06, CVE-2020-36174)
The ninja-forms plugin before 3.4.24.2 for WordPress allows CSRF with resultant XSS. (2020-04-29, CVE-2020-12462)
Why Cross-Site Request Forgery can be dangerous
The absence of Anti-CSRF tokens may lead to a Cross-Site Request Forgery attack that can result in executing a specific application action as another logged in user, e.g. steal their account by changing their email and password or silently adding a new admin user account when executed from the administrator account.
The attacker may copy one of your web application forms, e.g. email/password change form.
The webpage will contain a form with the exact set of fields as the original application but with input values already provided and the submit button replaced with a Javascript code causing auto-submission. When the page is accessed the form will be immediately submitted and page contents replaced with a valid content or a redirect to your original application.
One of your application users who is already logged in can be then tricked to navigate to such malicious page e.g. by clicking a link in a phishing email, and the pre-populated form content will be submitted to your application like it would be submitted by your user.