CVE-2026-23758

GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the ticket subject field that allows authenticated staff members to inject malicious JavaScript by manipulating the editsubject POST parameter. Attackers can inject XSS payloads through inadequate sanitization in Controller_Ticket.EditSubmit() that bypass the incomplete SanitizeForXSS() method to execute arbitrary JavaScript when other staff members or administrators view the affected ticket.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://gfi.ai/products-and-solutions/email-and-messaging-solutions/helpdesk/resources/product-releases	Release Notes
https://www.vulncheck.com/advisories/gfi-helpdesk-stored-xss-via-editsubject-parameter	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gfi:helpdesk:*:*:*:*:*:*:*:*

History

27 Apr 2026, 14:58

Type	Values Removed	Values Added
References	~~() https://gfi.ai/products-and-solutions/email-and-messaging-solutions/helpdesk/resources/product-releases -~~	() https://gfi.ai/products-and-solutions/email-and-messaging-solutions/helpdesk/resources/product-releases - Release Notes
References	~~() https://www.vulncheck.com/advisories/gfi-helpdesk-stored-xss-via-editsubject-parameter -~~	() https://www.vulncheck.com/advisories/gfi-helpdesk-stored-xss-via-editsubject-parameter - Third Party Advisory
CPE		cpe:2.3:a:gfi:helpdesk::::::::
First Time		Gfi Gfi helpdesk
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.4

20 Apr 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-20 18:16

Updated : 2026-04-27 14:58

NVD link : CVE-2026-23758

Mitre link : CVE-2026-23758

CVE.ORG link : CVE-2026-23758

JSON object : View

Products Affected

gfi

helpdesk

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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