FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. In versions 1.8.208 and below, the ThreadPolicy::edit() method contains a broken access control vulnerability that allows any authenticated user (regardless of role or mailbox access) to read and modify all customer-created thread messages across all mailboxes. This flaw enables silent modification of customer messages (evidence tampering), bypasses the entire mailbox permission model, and constitutes a GDPR/compliance violation. The issue has been fixed in version 1.8.209.
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wxg5-g9vv-v8g9
https://github.com/freescout-help-desk/freescout/releases/tag/1.8.209
https://github.com/freescout-help-desk/freescout/commit/996a7f96337fdd8a1d1bbd0da0ec7ec85d160b11