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.
History

Wed, 22 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
First Time appeared Freescout Helpdesk
Freescout Helpdesk freescout
Vendors & Products Freescout Helpdesk
Freescout Helpdesk freescout
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 21 Apr 2026 17:15:00 +0000

Type Values Removed Values Added
Description 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.
Title FreeScout's cross-user undo reply allows mailbox peers to recall another agent's outbound reply
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-04-21T16:57:33.146Z

Updated: 2026-04-21T19:10:40.989Z

Reserved: 2026-04-14T14:07:59.641Z

Link: CVE-2026-40592

cve-icon Vulnrichment

Updated: 2026-04-21T19:10:36.577Z

cve-icon NVD

Status : Received

Published: 2026-04-21T17:16:57.087

Modified: 2026-04-21T17:16:57.087

Link: CVE-2026-40592

cve-icon Redhat

No data.