Vulnerability · Published Apr 20, 2026 · Assigned by VulnCheck

CVE-2026-23753GFI HelpDesk < 4.99.9 Stored XSS via charset Parameter

Medium 4.8

In plain English

A medium-severity cross-site scripting in HelpDesk from GFI Software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)4.8Medium

Exploit odds (30 days)0.2%top 95.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 the browser of any administrator viewing the Languages page.

Affected products (as reported)

Vendor	Product	Versions
GFI Software	HelpDesk	0 – before 4.99.9

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

References

https://gfi.ai/products-and-solutions/email-and-messaging-solutions/helpdesk/resources/product-releases vendor-advisory, patch
https://www.vulncheck.com/advisories/gfi-helpdesk-stored-xss-via-charset-parameter third-party-advisory