CVE-2026-13040 json
NEX-Forms <= 9.2.2 - Unauthenticated Stored Cross-Site Scripting via 'real_val__' Parameter
published 4mo ago modified 4mo ago also EUVD-2026-41487
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
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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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.53% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- webaways NEX-Forms – Ultimate Forms Plugin for WordPress
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/49dc267a-48cf-487f-bedc-fd892666e9a0?source=cve
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.2.2/main.php#L467
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.2.2/main.php#L4896
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.2.2/main.php#L4870
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.2.2/main.php#L5323
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.2.2/includes/classes/class.functions.php#L2461
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.2.2/main.php#L2660
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.1.11/main.php#L467
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.1.11/main.php#L4896
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.1.11/main.php#L4870
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.1.11/main.php#L5323
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.1.11/includes/classes/class.functions.php#L2461
- plugins.trac.wordpress.org /browser/nex-forms-express-wp-form-builder/tags/9.1.11/main.php#L2660
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3584399%40nex-forms-express-wp-form-builder&new=3584399%40nex-f
Sources
- CVE List CVE-2026-13040
- NVD CVE-2026-13040
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.