CVE-2026-23756: Gfi Helpdesk

Medium severity, CVSS 5.4. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Gfi Helpdesk: before 4.99.9 (fixed in 4.99.9)

Published 2026-04-20. Last modified 2026-06-17.