---
id: CVE-2026-84750
title: >-
  The Ultra Addons for Contact Form 7 WordPress plugin before 3.5.51 does not
  validate the type or extension of files uploaded through one of its form
  fields, and stores them at a predictable public path with the attacker-chosen
  extension …
summary: >-
  The Ultra Addons for Contact Form 7 WordPress plugin before 3.5.51 does not
  validate the type or extension of files uploaded through one of its form
  fields, and stores them at a predictable public path with the attacker-chosen
  extension …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-434
product: Ultra Addons for Contact Form 7
affected:
  - ultra_addons_for_contact_form_7 >= 3.2.4 < 3.5.51
published: '2026-09-19'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T13:34:57.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84750'
references:
  - url: 'https://wpscan.com/vulnerability/44f68354-4be3-422f-9f94-af980b2ebc44/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
epss: 0.00445
epssPercentile: 0.36056
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-19T13:09:09.705675Z'
ingestedAt: '2026-09-19T06:59:13.116Z'
---

## Overview

The Ultra Addons for Contact Form 7 WordPress plugin before 3.5.51 does not validate the type or extension of files uploaded through one of its form fields, and stores them at a predictable public path with the attacker-chosen extension intact, allowing unauthenticated users to upload arbitrary files. The PHP handler shipped by default with the Debian and Ubuntu Apache packages maps .phar to PHP alongside .php and .phtml, so on that stack the uploaded file is executed and the issue leads to Remote Code Execution and full site takeover. Where the host routes only .php to the PHP handler, the same file is instead served from the site's own origin with its script intact, leading to Stored Cross-Site Scripting.

## Remediation

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