---
id: CVE-2026-111311
title: >-
  The DoubleScale | All-in-One CRM – Sales, Multi-Channel Marketing, Newsletter,
  Booking, Helpdesk, Automation, MCP & More plugin for WordPress is vulnerable
  to Arbitrary File Upload in all versions up to, and including, 1.5.1 via the
  stor…
summary: >-
  The DoubleScale | All-in-One CRM – Sales, Multi-Channel Marketing, Newsletter,
  Booking, Helpdesk, Automation, MCP & More plugin for WordPress is vulnerable
  to Arbitrary File Upload in all versions up to, and including, 1.5.1 via the
  stor…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-434
vendor: samuelgallegos
product: >-
  DoubleScale CRM | All-in-One CRM – Sales, Multi-Channel Marketing, Newsletter,
  Booking, Helpdesk, Automation, MCP & More
affected:
  - >-
    doublescale_crm_all-in-one_crm_sales_multi-channel_marketing_newsletter_booking_helpdesk_automation_mcp_more
    <= 1.5.1
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T14:51:17.720'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111311'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/doublescale/tags/1.4.6/includes/Core/Services/AttachmentService.php#L112
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/doublescale/tags/1.4.6/includes/Core/Services/AttachmentService.php#L446
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/doublescale/tags/1.4.6/includes/Modules/Support/Rest/Controllers/RestPortalController.php#L574
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/doublescale/tags/1.4.6/includes/Modules/Support/Rest/Controllers/RestPortalController.php#L622
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/0feed03e-fedf-4443-94e0-fbb2c8baba71?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
epss: 0.00511
epssPercentile: 0.434
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T14:13:49.566894Z'
ingestedAt: '2026-10-16T09:03:22.691Z'
---

## Overview

The DoubleScale | All-in-One CRM – Sales, Multi-Channel Marketing, Newsletter, Booking, Helpdesk, Automation, MCP & More plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.5.1 via the store_upload function. This is due to a fail-open extension allow-list in extension_is_allowed() that returns true when wp_check_filetype() yields an empty type for unrecognized extensions such as .php, combined with magic-byte-only MIME detection and no capability check beyond is_user_logged_in(). This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. Exploitation requires the Helpdesk module to be enabled, as the vulnerable REST endpoint is only registered when that module is active.

## Remediation

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