CVE-2026-13040
Received Received - Intake

Stored XSS in NEX-Forms Ultimate Forms WordPress Plugin

Publication date: 2026-07-03

Last updated on: 2026-07-03

Assigner: Wordfence

Description
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.

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Meta Information

Published
2026-07-03
Last Modified
2026-07-03
Generated
2026-07-03
AI Q&A
2026-07-03
EPSS Evaluated
N/A
NVD
CVE-2026-13040
EUVD
EUVD-2026-41487

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wpforms nex-forms to 9.2.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

The NEX-Forms – Ultimate Forms Plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) via the 'real_val__' parameter in all versions up to and including 9.2.2.

This vulnerability exists because the plugin does not properly sanitize input or escape output, allowing attackers to inject arbitrary web scripts.

Unauthenticated attackers can exploit this by submitting malicious scripts through the form submission endpoint, which lacks nonce verification and is accessible without authentication.

When a user accesses a page containing the injected script, the malicious code executes in their browser.

Impact Analysis

This vulnerability can allow attackers to execute arbitrary scripts in the context of the affected website.

Potential impacts include theft of user credentials, session hijacking, defacement of the website, or distribution of malware to visitors.

Because the attack can be performed by unauthenticated users, it increases the risk and ease of exploitation.

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