What is CVE-2026-23756?

CVE-2026-23756 is a medium-severity vulnerability in Gfi Software Helpdesk, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-20.

How severe is CVE-2026-23756?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Gfi Software Helpdesk

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…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (10.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Gfi Software Helpdesk — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gfi.ai/products-and-solutions/email-and-messaging-solutions/helpdesk/resources/… (vendor-advisory, patch)
www.vulncheck.com/advisories/gfi-helpdesk-stored-xss-via-troubleshooter-step-su… (third-party-advisory)

Frequently asked questions

What is CVE-2026-23756?: CVE-2026-23756 is a medium-severity vulnerability in Gfi Software Helpdesk, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-20.
How severe is CVE-2026-23756?: Medium severity. CVSS v3 base score is 5.4 out of 10.