CVE-2026-13040: 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 incl
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-13040
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-130400.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-13040 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for NEX-Forms
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- mediumCVE-2026-9017: The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to autho…nvd · 2026-07-11
- highCVE-2026-12142: The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Stor…nvd · 2026-07-01
- mediumCVE-2026-12404: The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to auth…nvd · 2026-06-27
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