FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.215, the reply and draft flows trust client-supplied encrypted attachment IDs. Any IDs present in attachments_all[] but omitted from retained lists are decrypted and passed directly to Attachment::deleteByIds(). Because load_attachments returns encrypted IDs for attachments on a visible conversation, a mailbox peer can replay those IDs through save_draft and delete the original attachment row and file. Version 1.8.215 fixes the vulnerability.
Exploitability
AV:NAC:LPR:LUI:NScope
S:UImpact
C:NI:HA:L7.1/CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:LAccess Control