---
id: CVE-2026-85097
title: >-
  The Bricksforge plugin for WordPress is vulnerable to unauthenticated
  arbitrary file upload in versions up to, and including, 3.1.8.9
summary: >-
  The Bricksforge plugin for WordPress is vulnerable to unauthenticated
  arbitrary file upload in versions up to, and including, 3.1.8.9. This is due
  to insufficient validation of the attacker-controlled URL field in the
  'temporaryFileUploa…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-434
vendor: Bricksforge
product: Bricksforge
affected:
  - Bricksforge <= 3.1.8.9
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T07:16:31.710'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85097'
references:
  - url: 'https://bricksforge.io/version-changelog/'
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/e993c929-f175-43a7-92e6-9d3b089b8dde?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-08T07:18:54.845Z'
---

## Overview

The Bricksforge plugin for WordPress is vulnerable to unauthenticated arbitrary file upload in versions up to, and including, 3.1.8.9. This is due to insufficient validation of the attacker-controlled URL field in the 'temporaryFileUploads' parameter during form submission. An unauthenticated attacker can first obtain a valid nonce via the bricksforge_regenerate_nonce AJAX endpoint, then upload a GIF/PHP polyglot file to the temporary upload directory where MIME type validation is correctly performed. Subsequently, the attacker can submit a form with a crafted 'temporaryFileUploads' parameter where the server-side file path points to the validated GIF file, but the attacker-controlled url field ends with a .php extension. This makes it possible for unauthenticated attackers to upload and execute arbitrary PHP code on the server.

## Remediation

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