The ninja-forms plugin before 3.2.15 for WordPress has parameter tampering.

The ninja-forms plugin before 3.3.21.2 for WordPress has SQL injection in the search filter on the submissions page.

Path Traversal and Unrestricted File Upload exists in the Ninja Forms plugin before 3.0.23 for WordPress (when the Uploads add-on is activated). This allows an attacker to traverse the file system to access files and execute code via the includes/fields/upload.php (aka upload/submit page) name and tmp_name parameters.

An open redirect in the Ninja Forms plugin before 3.3.19.1 for WordPress allows Remote Attackers to redirect a user via the lib/StepProcessing/step-processing.php (aka submissions download page) redirect parameter.

The Ninja Forms plugin before 3.3.14.1 for WordPress allows CSV injection.

The Ninja Forms plugin before 3.2.14 for WordPress has XSS.

The Ninja Forms plugin before 2.9.42.1 for WordPress allows remote attackers to conduct PHP object injection attacks via crafted serialized values in a POST request.

Multiple cross-site scripting (XSS) vulnerabilities in the Ninja Forms plugin before 2.8.9 for WordPress allow (1) remote attackers to inject arbitrary web script or HTML via the ninja_forms_field_1 parameter in a ninja_forms_ajax_submit action to wp-admin/admin-ajax.php or (2) remote administrators to inject arbitrary web script or HTML via the fields[1] parameter to wp-admin/post.php.

Unspecified vulnerability in the Ninja Forms plugin before 2.8.10 for WordPress has unknown impact and remote attack vectors related to admin users.