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CVE-2026-39384

FreeScout Customer Merge Cross-Mailbox Authorization Bypass

Published: Apr 7, 2026Updated: Apr 24, 2026 Sources: CVE List NVDCWE-639
NVD MITRE
7.6CVSSHIGH
EPSS Score
0.2%
Top 85.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.212, FreeScout does not take the limit_user_customer_visibility parameter into account when merging customers. This vulnerability is fixed in 1.8.212.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:HA:L
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:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-639

Affected Products

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

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-j6v9-22vq-53vh
github.com
https://github.com/freescout-help-desk/freescout/commit/b395a1179117af5e2df704c6bad71feeb301b4ce
github.com

Timeline

Published
Apr 7, 2026
Last Updated
Apr 24, 2026

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