---
id: CVE-2026-85743
title: >-
  FreeScout: Server-side request forgery via incomplete outbound host validation
  and unguarded download sinks
summary: >-
  FreeScout is a self-hosted help desk and shared mailbox. Prior to 1.8.230,
  multiple outbound paths in Helper::downloadRemoteFile(), Helper::checkPort(),
  Helper::sanitizeRemoteUrl(), MailboxesController.php, and
  ModulesController.php do n…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-918
vendor: freescout-help-desk
product: freescout
affected:
  - freescout < 1.8.230
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T17:06:26.940Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-85743'
references:
  - url: >-
      https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6w8v-qp43-vg2h
    label: >-
      https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6w8v-qp43-vg2h
  - url: >-
      https://github.com/freescout-help-desk/freescout/commit/09799fd4bcf731704bc2099a87bca0cf18d20acb
    label: >-
      https://github.com/freescout-help-desk/freescout/commit/09799fd4bcf731704bc2099a87bca0cf18d20acb
  - url: >-
      https://github.com/freescout-help-desk/freescout/commit/a4c587cf1fff87eae7d3e4f297fa4cc81ba28704
    label: >-
      https://github.com/freescout-help-desk/freescout/commit/a4c587cf1fff87eae7d3e4f297fa4cc81ba28704
  - url: 'https://github.com/freescout-help-desk/freescout/releases/tag/1.8.230'
    label: 'https://github.com/freescout-help-desk/freescout/releases/tag/1.8.230'
tags:
  - cve.org
ingestedAt: '2026-11-06T18:00:12.529Z'
epss: 0.00264
epssPercentile: 0.18291
---

## Overview

FreeScout is a self-hosted help desk and shared mailbox. Prior to 1.8.230, multiple outbound paths in Helper::downloadRemoteFile(), Helper::checkPort(), Helper::sanitizeRemoteUrl(), MailboxesController.php, and ModulesController.php do not consistently enforce a sink-level restricted-host policy. An authenticated administrator, or another authenticated user permitted to change mailbox connection settings or trigger module update or installation paths, can supply attacker-controlled URLs or hosts. The independent download and port-test sinks can reach encoded or otherwise uncovered loopback and internal addresses. The redirect-validation bypass additionally requires a configured whitelist that permits the original and final hosts while a restricted internal host appears only as an intermediate redirect hop. No unauthenticated SSRF path is established. The server can consequently contact loopback and internal services, provide a blind internal port oracle, and retrieve internal HTTP responses into application-controlled download sinks. This issue is fixed in version 1.8.230.

## Affected

- `freescout < 1.8.230`

## Remediation

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