CVE-2026-40589: Freescout-Help-Desk Freescout

High severity, CVSS 7.6. EPSS: 0.4% chance of exploitation in the next 30 days.

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, a low-privileged agent can edit a visible customer and add an email address already owned by a hidden customer in another mailbox. The server discloses the hidden customer’s name and profile URL in the success flash, reassigns the hidden email to the visible customer, and rebinds hidden-mailbox conversations for that email to the visible customer. Version 1.8.214 fixes the issue.

Affected products

• Freescout-Help-Desk Freescout: before 1.8.214 (fixed in 1.8.214)

Published 2026-04-21. Last modified 2026-06-17.