The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'type' parameter in all versions up to, and including, 9.3.2 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.
NEX-Forms – Ultimate Forms Plugin for WordPress versions up to and including 9.3.0 contains an SQL Injection vulnerability via the 'additional_params' parameter. Authenticated users with custom-level access or higher can exploit this flaw to append malicious SQL queries, potentially extracting sensitive database information. The issue arises because input sanitization is insufficient and an operator allowlist is inconsistently applied, leaving the SQL query vulnerable.
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to generic SQL Injection via the 'additional_params' parameter in all versions up to, and including, 9.2.4 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with admin-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This is a second-order vulnerability; the payload is stored via the submission_report2 AJAX handler (which lacks a nonce check and relies solely on a capability that can be configured down to subscriber-level) and triggered when a CSV export is generated.
The Nex Forms – Ultimate Form Builder – Lite plugin for WordPress is vulnerable to arbitrary file deletion via path traversal in versions up to, and including, 9.2.3. This is due to the delete_file() AJAX handler retrieving a file path from the database and passing it directly to unlink() with no validation (no realpath(), basename(), or allowlist check), combined with the insert_record() AJAX handler that lets the same authenticated user store an arbitrary value in the target 'location' column (wp_kses() only strips HTML tags and does not neutralize path traversal or absolute paths). This makes it possible for authenticated attackers, with admin-level access and above, to delete arbitrary files on the affected site's server, including wp-config. When the plugin's user-level option is configured to something else, this may be exploitable with lower privileges.
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 9.2.2. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to overwrite the saved_admin_email, saved_user_email, and saved_user_email_address fields of arbitrary form entries belonging to other users, and cause the site to dispatch attacker-controlled email content to attacker-chosen recipient addresses.
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'real_val__' parameter in all versions up to, and including, 9.2.2 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. The submission endpoint is registered via wp_ajax_nopriv_submit_nex_form with no nonce verification, making it fully accessible to unauthenticated attackers without any CSRF token.
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via '_name[]' Array Parameter in all versions up to, and including, 9.2.2 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. The wp_kses() output filtering pass provides no mitigation because NEXForms_allowed_tags() explicitly permits <script>, <iframe src/srcdoc>, and JS event handlers such as onClick, onBlur, and onChange in its allow-list.
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 9.2.2. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to enumerate sequential report IDs and download complete form submission data — including names, email addresses, phone numbers, postal addresses, payment details, and uploaded file paths — for any saved report on the site.
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to time-based blind SQL Injection via the 'table' parameter in all versions up to, and including, 9.1.12 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with administrator-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
CVE-2026-5063 is a high-severity stored cross-site scripting (XSS) vulnerability in the NEX-Forms – Ultimate Forms Plugin for WordPress, affecting versions up to and including 9.1.11. The vulnerability arises from insufficient input sanitization and output escaping of POST parameter key names in the submit_nex_form() function. This allows unauthenticated attackers to inject arbitrary web scripts that execute when a user accesses the affected page. There is no official patch or remediation level currently provided by the vendor. No known exploits are reported in the wild at this time.
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 9.1.9 via the submit_nex_form() function due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to to overwrite arbitrary form entries via the 'nf_set_entry_update_id' parameter.
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the deactivate_license() function in all versions up to, and including, 9.1.9. This makes it possible for authenticated attackers, with Subscriber-level access and above, to to deactivate the plugin license.
The NEX-Forms – Ultimate Forms Plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the NF5_Export_Forms class constructor in all versions up to, and including, 9.1.8. This makes it possible for unauthenticated attackers to export form configurations, that may include sensitive data, such as email addresses, PayPal API credentials, and third-party integration keys by enumerating the nex_forms_Id parameter.
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to SQL Injection via the 'orderby' parameter in the action nf_load_form_entries in all versions up to, and including, 9.1.6 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Administrator-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This may be exploitable by lower-level users if access is granted by a site administrator.
The NEX-Forms – Ultimate Form Builder – Contact forms and much more plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 8.8.1 via file uploads due to insufficient directory listing prevention and lack of randomization of file names. This makes it possible for unauthenticated attackers to extract sensitive data including files uploaded via a form.
The NEX-Forms – Ultimate Form Builder – Contact forms and much more plugin for WordPress is vulnerable to SQL Injection via the 'search_params' parameter in all versions up to, and including, 8.7.15 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This can be exploited via CSRF due to a lack of nonce validation on the get_table_records AJAX action.
The NEX-Forms – Ultimate Form Builder – Contact forms and much more plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on the set_read() function in all versions up to, and including, 8.5.6. This makes it possible for authenticated attackers, with subscriber-level access and above, to mark records as read.
The NEX-Forms – Ultimate Form Builder – Contact forms and much more plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on the set_starred() function in all versions up to, and including, 8.5.6. This makes it possible for authenticated attackers, with subscriber-level access and above, to mark records as starred.