CVE-2026-40590
MEDIUMFreeScout's Customer AJAX Create Modifies Hidden Existing Customer
Title source: cnaDescription
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.
Scores
CVSS v3
4.3
EPSS
0.0003
EPSS Percentile
7.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Details
CWE
CWE-639
Status
published
Products (1)
freescout-help-desk/freescout
< 1.8.214
Published
Apr 21, 2026
Tracked Since
Apr 21, 2026