How severe is CVE-2026-23758?

CVE-2026-23758 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-2026-23758 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23758?

CVE-2026-23758 affects Gfi Helpdesk. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23758?

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

Does CVE-2026-23758 have an EU (EUVD) identifier?

Yes. CVE-2026-23758 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23910.

When was CVE-2026-23758 published?

CVE-2026-23758 was published on 2026-04-20 and last updated on 2026-06-17.

CVE-2026-23758

CVE-2026-23758 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: 6.4
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23910
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 ticket subject field that allows authenticated staff members to inject malicious JavaScript by manipulating the editsubject POST parameter. Attackers can inject XSS payloads through inadequate sanitization in Controller_Ticket.EditSubmit() that bypass the incomplete SanitizeForXSS() method to execute arbitrary JavaScript when other staff members or administrators view the affected ticket.

Frequently asked questions

What is CVE-2026-23758?: GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the ticket subject field that allows authenticated staff members to inject malicious JavaScript by manipulating the editsubject POST parameter. Attackers can inject XSS payloads through inadequate sanitization in Controller_Ticket.EditSubmit() that bypass the incomplete SanitizeForXSS() method to execute arbitrary JavaScript when other staff members or administrators view the affected ticket.
How severe is CVE-2026-23758?: CVE-2026-23758 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-2026-23758 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23758?: CVE-2026-23758 affects Gfi Helpdesk. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23758?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-23758 have an EU (EUVD) identifier?: Yes. CVE-2026-23758 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23910.
When was CVE-2026-23758 published?: CVE-2026-23758 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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