CVE-2026-23753: GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the language management fun

Q: How do I fix CVE-2026-23753?

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

Q: Is CVE-2026-23753 being exploited?

CVE-2026-23753 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-2026-23753 affect?

CVE-2026-23753 affects helpdesk. Severity is medium (CVSS 4.8). GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the language management functionality where the charset POST parameter is passed directly to SWIFT_Language::Create() without HTML sanitization and subsequen

Q: How urgent is CVE-2026-23753?

Priority 18/100. No elevated risk signals yet.

Routine

MEDIUM 4.8UPGRADE

CVE-2026-23753 is a medium-severity flaw (CVSS 4.8) 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 language management functionality where the charset POST parameter is passed directly to SWIFT_Language::Create() without HTML sanitization and subsequently rendered unsanitized by View_Language.RenderGrid(). An authenticated administrator can inject arbitrary JavaScript through the charset field when creating or editing a language, and the payload executes in

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.2% (top 96%)
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 21:10 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-2026-23753?

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

Is CVE-2026-23753 being exploited?

CVE-2026-23753 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-2026-23753 affect?

CVE-2026-23753 affects helpdesk. Severity is medium (CVSS 4.8). GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the language management functionality where the charset POST parameter is passed directly to SWIFT_Language::Create() without HTML sanitization and subsequen

How urgent is CVE-2026-23753?

Priority 18/100. No elevated risk signals yet.

Software pages

Swift vulnerabilities

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References

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