How severe is CVE-2026-23756?

CVE-2026-23756 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-23756 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23756?

CVE-2026-23756 affects Gfi Helpdesk. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23756?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-23756 have an EU (EUVD) identifier?

Yes. CVE-2026-23756 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23908.

When was CVE-2026-23756 published?

CVE-2026-23756 was published on 2026-04-20 and last updated on 2026-06-17.

CVE-2026-23756

CVE-2026-23756 is a medium-severity vulnerability in Gfi Helpdesk with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 5.1
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23908
Weakness: CWE-79
Affected product: Gfi Helpdesk
Published: 2026-04-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-23756?: 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.
How severe is CVE-2026-23756?: CVE-2026-23756 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-23756 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23756?: CVE-2026-23756 affects Gfi Helpdesk. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23756?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-23756 have an EU (EUVD) identifier?: Yes. CVE-2026-23756 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23908.
When was CVE-2026-23756 published?: CVE-2026-23756 was published on 2026-04-20 and last updated on 2026-06-17.

References

Affected products (1)

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

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