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CVE-2026-23756

GFI HelpDesk < 4.99.9 Stored XSS via Troubleshooter Step Subject

CVSS 4.0 5.1 MEDIUMCVSS 3.1 5.4 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-23756

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-23756

Published

HelpDesk

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "GFI Software",
                    "product": "HelpDesk",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "4.99.9",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON