CVE-2026-40592: Freescout-Help-Desk Freescout

Medium severity, CVSS 5.9. 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, the undo-send route `GET /conversation/undo-reply/{thread_id}` checks only whether the current user can view the parent conversation. It does not verify that the current user created the reply being undone. In a shared mailbox, one agent can therefore recall another agent's just-sent reply during the 15-second undo window. Version 1.8.214 fixes the vulnerability.

Affected products

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