CVE-2026-23756: GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the Troubleshooter module w

Q: How do I fix CVE-2026-23756?

helpdesk: upgrade to 4.99.9. Exact commands for each OS are on this page.

Q: Is CVE-2026-23756 being exploited?

CVE-2026-23756 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-23756 affect?

CVE-2026-23756 affects helpdesk. Severity is medium (CVSS 5.4). 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_

Q: How urgent is CVE-2026-23756?

Priority 20/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2026-23756 is a medium-severity flaw (CVSS 5.4) affecting helpdesk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 cl

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-20
Last modified	2026-10-26

Publisher (CNA): VulnCheck · Vendor: gfi

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-20 18:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

gfi helpdesk UPGRADE

Affected: < 4.99.9

Fixed in: 4.99.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy helpdesk || rpm -q helpdesk || helpdesk --version

2. UPGRADE to 4.99.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade helpdesk

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade helpdesk

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-23756?

helpdesk: upgrade to 4.99.9. Exact commands for each OS are on this page.

Is CVE-2026-23756 being exploited?

CVE-2026-23756 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-23756 affect?

CVE-2026-23756 affects helpdesk. Severity is medium (CVSS 5.4). 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_

How urgent is CVE-2026-23756?

Priority 20/100. No elevated risk signals yet.

Related CVEs

CVE-2026-23758 MEDIUM 5.4 UPGRADE GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the ticket subject field th
CVE-2026-23757 MEDIUM 5.4 UPGRADE GFI HelpDesk before 4.99.10 contains a stored cross-site scripting vulnerability in the Reports module where t
CVE-2026-23752 MEDIUM 4.8 UPGRADE GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the template group creation
CVE-2026-23753 MEDIUM 4.8 UPGRADE GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the language management fun

References

← Back to latest CVEs