# CVE-2026-103962: CVE-2026-103962

Status: published. Published: 2026-10-31. Updated: 2026-11-01.

The User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'field_attr[required]' parameter in all versions up to, and including, 4.3.13 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The nonce check on the wpuf_get_child_cat AJAX action is not an effective security barrier because the wpuf_nonce value is publicly localized to every anonymous visitor of any page containing a WPUF shortcode, making it freely harvestable by an unauthenticated attacker.

## Remediation

No remediation reported in collected sources

## Affected products and versions

Not reported in collected sources.

## Severity and prioritization

- CVSS 3.1: 6.1 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N; source: NVD: security@wordfence.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact partial; source NVD SSVC: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- Weaknesses: CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/includes/Frontend.php#L311 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/wpuf-functions.php#L2025 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/wpuf-functions.php#L2045 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/wpuf-functions.php#L2120 (security@wordfence.com)

- https://plugins.trac.wordpress.org/changeset/3770255/wp-user-frontend/trunk/wpuf-functions.php (security@wordfence.com)

- https://www.wordfence.com/threat-intel/vulnerabilities/id/7e9e7f3e-900c-4e84-8226-8dc6450b0a31?source=cve (security@wordfence.com)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-103962; retrieved 2026-11-02; source updated 2026-11-01

Revision: 6edb0c6f8376b733b0347034870cbf877e7f7c7412d204b91914c1f4fd4c48a3

Canonical: https://y2.dev/cve/CVE-2026-103962