---
id: CVE-2026-15450
title: >-
  The Nex Forms – Ultimate Form Builder – Lite plugin for WordPress is
  vulnerable to arbitrary file deletion via path traversal in versions up to,
  and including, 9.2.3
summary: >-
  The Nex Forms – Ultimate Form Builder – Lite plugin for WordPress is
  vulnerable to arbitrary file deletion via path traversal in versions up to,
  and including, 9.2.3. This is due to the delete_file() AJAX handler retrieving
  a file path f…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-22
published: '2026-08-01'
updated: '2026-08-01'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-15450'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.2.3/includes/classes/class.db.php#L269
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.2.3/includes/classes/class.db.php#L273
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-builder/tags/9.2.3/includes/classes/class.db.php#L805
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3625615%40nex-forms-express-wp-form-builder&new=3625615%40nex-forms-express-wp-form-builder
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/bb5c8cb3-df67-4f2c-869a-48e34f5619ff?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00584
epssPercentile: 0.45624
ingestedAt: '2026-08-02T05:17:47.990Z'
---

## Overview

The Nex Forms – Ultimate Form Builder – Lite plugin for WordPress is vulnerable to arbitrary file deletion via path traversal in versions up to, and including, 9.2.3. This is due to the delete_file() AJAX handler retrieving a file path from the database and passing it directly to unlink() with no validation (no realpath(), basename(), or allowlist check), combined with the insert_record() AJAX handler that lets the same authenticated user store an arbitrary value in the target 'location' column (wp_kses() only strips HTML tags and does not neutralize path traversal or absolute paths). This makes it possible for authenticated attackers, with admin-level access and above, to delete arbitrary files on the affected site's server, including wp-config. When the plugin's user-level option is configured to something else, this may be exploitable with lower privileges.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.