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CVE-2026-34442

FreeScout: Host Header Injection Leading to External Resource Loading and Open Redirect in FreeScout

Published: Mar 31, 2026Updated: Jul 24, 2026 Sources: CVE List NVDCWE-20
5.4MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 87.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.211, host header manipulation in FreeScout version (http://localhost:8080/system/status) allows an attacker to inject an arbitrary domain into generated absolute URLs. This leads to External Resource Loading and Open Redirect behavior. When the application constructs links and assets using the unvalidated Host header, user requests can be redirected to attacker-controlled domains and external resources may be loaded from malicious servers. This issue has been patched in version 1.8.211.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-20CWE-601CWE-829

Affected Products

freescout
commercial
freescoutMixed
Enterprise Software / itsm-monitoring
freescout-help-desk
commercial
freescoutOn-premWeb App
Enterprise Software / itsm-monitoring

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques
Initial Access
View detailed technique mapping

References

https://github.com/freescout-help-desk/freescout/commit/889d75c8e3c15e6a7ddb6a4d4f65cc0379c29213
github.com
https://github.com/freescout-help-desk/freescout/releases/tag/1.8.211
github.com
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-822g-7rw5-53xj
github.com

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