CVE-2026-12142
CVE-2026-12142 is a high-severity vulnerability with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: High (CVSS 3.x base score 7.2)
- EPSS exploit prediction: 0% (22nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2026-12142?
- 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.
- How severe is CVE-2026-12142?
- CVE-2026-12142 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2026-12142 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-12142?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2026-12142 published?
- CVE-2026-12142 was published on 2026-07-01.
References
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.1.10/includes/classes/class.db.php#L2660
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.1.10/includes/classes/class.db.php#L2809
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.1.10/includes/classes/class.functions.php#L2343
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.1.10/main.php#L2660
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.1.10/main.php#L2720
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.1.10/main.php#L2903
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.2.2/includes/classes/class.db.php#L2660
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.2.2/includes/classes/class.db.php#L2809
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.2.2/includes/classes/class.functions.php#L2343
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.2.2/main.php#L2660
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.2.2/main.php#L2720
- https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.2.2/main.php#L2903
- https://plugins.trac.wordpress.org/changeset?old_path=%2Fnex-forms-express-wp-form-builder/tags/9.2.2&new_path=%2Fnex-forms-express-wp-form-builder/tags/9.2.3
- https://www.wordfence.com/threat-intel/vulnerabilities/id/da235dea-4884-4e6a-a8b8-65d34f050684?source=cve
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