CVE-2026-40589
FreeScout has Customer Edit Cross-Mailbox Email Takeover
CVSS Score
7.6
EPSS Score
0.0%
EPSS Percentile
0th
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, a low-privileged agent can edit a visible customer and add an email address already owned by a hidden customer in another mailbox. The server discloses the hidden customer’s name and profile URL in the success flash, reassigns the hidden email to the visible customer, and rebinds hidden-mailbox conversations for that email to the visible customer. Version 1.8.214 fixes the issue.
| CWE | CWE-639 |
| Vendor | freescout-help-desk |
| Product | freescout |
| Published | Apr 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low
Affected Versions
freescout-help-desk / freescout
< 1.8.214