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CVE-2026-67187

Ninja Forms WordPress Plugin < 3.15.4 Server-Side Validation Bypass via List Fields

Ninja Forms plugin for WordPress before 3.15.4 contains an incomplete server-side validation vulnerability that allows unauthenticated attackers to submit arbitrary values to Checkbox List, Multi-Select List, Image List, Country, and State fields because NF_Abstracts_List falls through to a validate() method that only checks required-field presence. Attackers can submit crafted formula payloads through the unauthenticated nf_ajax_submit endpoint that bypass CSV escaping applied only to Textbox and Textarea fields, resulting in CSV injection when an administrator downloads and opens the exported submissions file.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Vendors
Saturday Drive Wordpress-extensions
Products
Ninja Forms Ninja Forms
CVE-2026-100155

Ninja Forms <= 3.15.5 - Unauthenticated Arbitrary Shortcode Execution via 'formData' Field Value via Success Message Merge Tag

The The Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 3.15.5 This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Kstover Wordpress-extensions
Products
Ninja Forms – Contact Form Builder With Calculators, Quizzes, Signatures & Ai Form Builder Ninja Forms
CVE-2026-110899

WordPress Ninja Forms plugin <= 3.15.5 - Cross Site Scripting (XSS) vulnerability

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Kevin Stover Ninja Forms ninja-forms allows Stored XSS.This issue affects Ninja Forms: from n/a through 3.15.5.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Kevin Stover Wordpress-extensions
Products
Ninja Forms Ninja Forms
CVE-2026-92820

Ninja Forms - File Uploads <= 3.3.34 - Unauthenticated Arbitrary File Upload

The Ninja Forms - File Uploads plugin for WordPress is vulnerable to arbitrary file operations in all versions up to, and including, 3.3.34 via the external (Amazon S3) upload flow. The plugin trusts an attacker-supplied file path from the form submission and stores it as the upload's file_path, which is then used without validation to attach a file to the form's notification email (arbitrary file read), to write fetched content (arbitrary file write, leading to remote code execution when the external store is configured), and in a scheduled deletion (arbitrary file deletion). This makes it possible for unauthenticated attackers to read, write, or delete arbitrary files on the server. Exploitation requires the site to use the plugin's External File Upload (Amazon S3) action; the read variant additionally requires a form Email action configured to attach the uploaded file.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Vendors
Saturdaydrive Wordpress-extensions
Products
Ninja Forms - File Uploads Ninja Forms
CVE-2026-90438

Ninja Forms <= 3.15.4 - Unauthenticated Stored Cross-Site Scripting via Paragraph Text (RTE) Field Submission

The Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Paragraph Text (RTE) Field Submission in all versions up to, and including, 3.15.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is only exploitable when the targeted Paragraph Text field has the Rich Text Editor (RTE) option enabled.

CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Kstover Wordpress-extensions
Products
Ninja Forms – Contact Form Builder With Calculators, Quizzes, Signatures & Ai Form Builder Ninja Forms