CVE-2026-40592
FreeScout's cross-user undo reply allows mailbox peers to recall another agent's outbound reply
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | freescout-help-desk |
| Product | freescout |
| Published | Apr 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
Low
Affected Versions
freescout-help-desk / freescout
< 1.8.214