TI-2026-19129 Aliases CVE-2026-23756 GHSA-99wh-5v8j-65hf

GFI HelpDesk < 4.99.9 Stored XSS via Troubleshooter Step Subject

LOW 22CWE-79Published 2026-04-20 · Updated 2026-10-01

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: None · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the Troubleshooter module where the subject POST parameter is not sanitized in Controller_Step.InsertSubmit() and EditSubmit() before being rendered by View_Step.RenderViewSteps(). An authenticated staff member can inject arbitrary JavaScript into the step subject field, and the payload executes when any user navigates to Troubleshooter > View Troubleshooter and clicks the affected step link.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00141 3rd percentileScored 2026-11-07

Fix Fixed HelpDesk (GFI Software): 4.99.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
GFI Software	HelpDesk	before 4.99.9	4.99.9	Patch available	CNA

HelpDesk VendorGFI Software Affected before 4.99.9 Fixed in 4.99.9 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:gfi:helpdesk::::::::	before 4.99.9	Vulnerable	GFI Software

cpe:2.3:a:gfi:helpdesk:*:*:*:*:*:*:*:* Versions before 4.99.9 Vulnerable ·GFI Software

Remediation

Fix · CNA HelpDesk (GFI Software) Fixed in 4.99.9

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2026-04-20
GFI Software HelpDesk — gfi.ai/products-and-solutions/email-and-messaging-solutions…
5 records Highest priority Priority LOW 5 LOW
Other records, highest priority first
- TI-2026-19131 GFI HelpDesk < 4.99.9 Stored XSS via editsubject ParameterPriority LOW 27
- TI-2026-19130 GFI HelpDesk < 4.99.10 Stored XSS via Reports ModulePriority LOW 22
- TI-2026-19126 GFI HelpDesk < 4.99.9 Stored XSS via charset ParameterPriority LOW 21
Show all 5 records → Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-23756
2026-10-03 Alias added: GHSA-99wh-5v8j-65hf

References

Patch 1

https://gfi.ai/products-and-solutions/email-and-messaging-solutions/helpdesk/resources/product-releases

TI-2026-19131 GFI HelpDesk < 4.99.9 Stored XSS via editsubject Parameter CVSS 4.0MEDIUM 6.4
TI-2026-19130 GFI HelpDesk < 4.99.10 Stored XSS via Reports Module CVSS 4.0MEDIUM 5.1
TI-2026-19126 GFI HelpDesk < 4.99.9 Stored XSS via charset Parameter CVSS 4.0MEDIUM 4.8
TI-2026-19125 GFI HelpDesk < 4.99.9 Stored XSS via companyname Parameter CVSS 4.0MEDIUM 4.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences