Security Advisory

CVE-2026-40496

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-04-21 01:38:50

Last updated 2026-04-21 13:50:39

Assigner GitHub_M

State PUBLISHED

Description

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, attachment download tokens are generated using a weak and predictable formula: `md5(APP_KEY + attachment_id + size)`. Since attachment_id is sequential and size can be brute-forced in a small range, an unauthenticated attacker can forge valid tokens and download any private attachment without credentials. Version 1.8.213 fixes the issue.

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