CVE-2026-23756

GFI HelpDesk < 4.99.9 Stored XSS via Troubleshooter Step Subject

MEDIUM
5.4
CVSS Score
Published: April 20, 2026 at 05:30 PM UTC
Updated: October 1, 2026 at 03:19 PM UTC
1 product affected across 1 vendorHelpDesk

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.99.9
Affected range stops below 4.99.9, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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