FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.215, customer-thread editing is authorized through `ThreadPolicy::edit()`, which checks mailbox access but does not apply the assigned-only restriction from `ConversationPolicy`. A user who cannot view a conversation can still load and edit customer-authored threads inside it. Version 1.8.215 fixes the vulnerability.
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-4h5p-7f5c-q7gj
https://github.com/freescout-help-desk/freescout/releases/tag/1.8.215
https://github.com/freescout-help-desk/freescout/commit/cdadaf621bb1e1d017315df20d743671f7eae7a9