Ninja Forms vulnerabilities

Unauthenticated Cross Site Scripting (XSS) in Ninja Forms versions up to 3.15.3. An attacker can inject malicious script without authentication.

The Ninja Forms plugin version 3.14.8 and prior for WordPress Multisite contains an incorrect authorization vulnerability that allows a subsite Administrator to trigger network-wide deletion of all Ninja Forms data. Attackers can send a crafted POST request to the admin-ajax.php endpoint with the nf_delete_all_data action and a per-site nonce to invoke migration routines that unconditionally iterate all blogs via switch_to_blog(), dropping all nf3_* tables and clearing options and transients across every subsite in the network without requiring super-admin or network-admin privileges.

The Ninja Forms plugin for WordPress versions 3.10.4 through 3.14.9 contains an unauthenticated stored cross-site scripting vulnerability in the Repeatable Fieldset feature. The parseSubmissionIndex() function accepts arbitrary strings as submission indexes without numeric validation, and admin_form_element() interpolates the index directly into HTML without escaping. An unauthenticated attacker can submit a public form with a crafted repeater child key containing malicious script payloads, which execute in an administrator's browser when viewing submissions in the WordPress admin panel.

The Ninja Forms plugin for WordPress before version 3.0.23 (when the Uploads add-on is activated) contains path traversal and unrestricted file upload vulnerabilities. This allows an attacker to traverse the file system to access files and execute code via the name and tmp_name parameters in includes/fields/upload.php.

The Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder plugin for WordPress is vulnerable to Reflected DOM-Based Cross-Site Scripting via the 'querystring:<key>' URL parameter in all versions up to and including 3.15.5 due to insufficient input sanitization and output escaping. Unauthenticated attackers can inject arbitrary web scripts that execute if they can trick a user into performing an action such as clicking a link. The bypass is triggered when an attacker supplies a matching 'field:<key>' URL parameter that causes the server to fully resolve the {field:*} placeholder, forcing the client-side else-branch to abandon the server-sanitized value and reconstruct field content from the raw query string.

The Ninja Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'formData.extra' parameter in all versions up to, and including, 3.15.5 due to insufficient input sanitization and output escaping. This allows unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Ninja Forms 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 authenticated attackers, with subscriber-level access and above, to execute arbitrary shortcodes.

The Ninja Forms plugin for WordPress (versions up to and including 3.15.5) is vulnerable to arbitrary shortcode execution. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode, enabling unauthenticated attackers to execute arbitrary shortcodes.

The 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. Attackers can submit crafted formula payloads through the unauthenticated nf_ajax_submit endpoint, bypassing CSV escaping applied only to Textbox and Textarea fields, resulting in CSV injection when an administrator downloads and opens the exported submissions file.

The Ninja Forms plugin for WordPress (versions up to and including 3.15.4) is vulnerable to Stored Cross-Site Scripting via Paragraph Text (RTE) field submission due to insufficient input sanitization and output escaping. An unauthenticated attacker can inject arbitrary web scripts into pages that execute when a user accesses the injected page. This is only exploitable when the targeted Paragraph Text field has the Rich Text Editor (RTE) option enabled.

The Ninja Forms plugin in versions up to and including 3.15.3 contains an unauthenticated Cross Site Scripting (XSS) vulnerability. An attacker can inject malicious script into the page.

Ninja Forms 3.15.3 stores an anonymous non-RTE textarea value and renders it without safe HTML encoding in the legacy submission editor. An attacker can break out of the textarea with stored script. When an Administrator opens the attacker-known direct submission URL, the script runs in the WordPress admin origin.

The Ninja Forms WordPress plugin 3.15.3 does not escape submitted form field values before outputting them on the submission edit screen in the admin area. An unauthenticated user can submit values through a public form that then execute in the browser of any high-privileged user who reviews the submission.

The Ninja Forms WordPress plugin 3.15.3 does not prevent user-submitted form field values from being deserialised when an administrator later exports form submissions to CSV. This allows unauthenticated attackers to perform PHP Object Injection; if a suitable POP chain is present via another installed plugin or theme, this can lead to actions such as arbitrary file operations or remote code execution.

The Ninja Forms plugin for WordPress is vulnerable to PHP Object Injection in all versions up to 3.14.6 via deserialization of untrusted input. Authenticated attackers with administrator access can inject a PHP object. No known POP chain exists, but if another plugin or theme provides one, it may allow file deletion, data theft, or code execution.

The Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Repeater Child 'type' Confusion via Unmatched Array Key in all versions up to, and including, 3.15.1 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. Exploitation requires the Ninja Forms File Uploads add-on to be active, as the attack routes the unwhitelisted child entry through the File Uploads handler to write an attacker-supplied HTML file containing arbitrary JavaScript into any web-server-writable directory, including the site root, where it is served from the site's own origin.

The Ninja Forms WordPress plugin before version 3.15.2 does not restrict its REST abilities to administrators, treating a plugin-specific capability as equivalent to full site administration. This allows any user granted that capability to read settings and stored submissions, overwrite configuration, and create or modify arbitrary posts and pages.

The Ninja Forms WordPress plugin before 3.14.10 does not prevent user-supplied query-string input, used to pre-populate a form field's default value, from being processed as a shortcode, allowing unauthenticated attackers to execute arbitrary shortcodes registered on the site when a form so configured is embedded on a public page.

The Ninja Forms plugin for WordPress is vulnerable to generic SQL injection via import files. An authenticated attacker with admin privileges can append SQL queries to existing ones to extract sensitive data from the database.

Ninja Forms WordPress plugin version 3.14.8 and earlier contains an improper input validation vulnerability. Unauthenticated attackers can inject arbitrary numeric values into form calculations and payment totals by submitting values that do not match any configured option in ListSelect or ListRadio fields. This can lead to manipulation of payment amounts, including setting them to zero.

Vulnerability in the Ninja Forms WordPress plugin version 3.14.8 allows unauthenticated attackers to bypass form validation by merging attacker-controlled field metadata before validation. Attackers can send a malicious AJAX request, overriding field types, removing required flags, and disabling CAPTCHA.

Vulnerability in the Ninja Forms WordPress plugin version 3.14.8 and earlier. Missing authorization in the Gutenberg block 'ninja-forms/submissions-table' allows authenticated attackers with Author role to expose stored form submissions (including PII) to unauthenticated visitors.

The Ninja Forms plugin for WordPress is vulnerable to unauthorized data access due to a missing authorization check on the 'ninja-forms-views/token/refresh' REST callback in all versions up to and including 3.14.1. This allows unauthenticated attackers to view form submissions, which may contain sensitive information.

The Ninja Forms plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to and including 3.12.0. This is due to missing or incorrect nonce validation on the maybe_opt_in() function, allowing unauthenticated attackers to opt a site into usage statistics collection via a forged request if they can trick an administrator into clicking a link.

The Ninja Forms plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to and including 3.12.0. This is due to missing or incorrect nonce validation when exporting CSV files, allowing unauthenticated attackers to delete those files if they can trick an administrator into clicking a link.