CVE-2026-41906

HIGH 7.1

FreeScout: Conversation Change-Customer Cross-Mailbox Authorization Bypass

CVSS Score

7.1

EPSS Score

0.0%

EPSS Percentile

0th

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.214, the Change Customer modal correctly hides out-of-scope customers through the mailbox-filtered search endpoint, but the backend conversation_change_customer action accepts any supplied customer_email. A low-privileged agent can forge a request and bind a visible conversation to a hidden customer in another mailbox. This issue has been patched in version 1.8.214.

CWE	CWE-639
Vendor	freescout-help-desk
Product	freescout
Published	May 7, 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:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

Affected Versions

freescout-help-desk / freescout

< 1.8.214

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-p6hg-2cwg-rrx9 github.com: https://github.com/freescout-help-desk/freescout/releases/tag/1.8.214