Description

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the Change Customer modal exposes a “Create a new customer” flow via POST /customers/ajax with action=create. Under limited visibility, the endpoint drops unique-email validation. If the supplied email already belongs to a hidden customer, Customer::create() reuses that hidden customer object and fills empty profile fields from attacker-controlled input. Version 1.8.214 fixes the vulnerability.

INFO

Published Date :

2026-04-21T16:52:27.992Z

Last Modified :

2026-04-21T17:39:21.865Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-40590 vulnerability.

Vendors Products
Freescout Helpdesk
  • Freescout
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-40590.

URL Resource
https://github.com/freescout-help-desk/freescout/commit/b3d7611e6e173ed8a5e525b791deb6b32cf1ce62 cve-icon cve-icon
https://github.com/freescout-help-desk/freescout/releases/tag/1.8.214 cve-icon cve-icon
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wjw4-8xg6-342m cve-icon cve-icon cve-icon
Login to claim this CVE

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact