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CVE-2026-41906

FreeScout: Conversation Change-Customer Cross-Mailbox Authorization Bypass

Published: May 7, 2026Updated: May 8, 2026 Sources: CVE List NVDCWE-639
NVD MITRE
7.1CVSSHIGH
EPSS Score
0.2%
Top 93.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-639

Affected Products

freescoutfreescout-help-desk
On-premWeb App
Enterprise Software / itsm-monitoring
freescout-help-deskcommercialEnterprise Software

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

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

Timeline

Published
May 7, 2026
Last Updated
May 8, 2026

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