CVE-2026-23753

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.

CVSS 4.0

4.8CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS 3.1

4.8CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-26)

CWE

CWE-79

Published

2026-04-20

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• gfi:helpdesk

References

• https://gfi.ai/products-and-solutions/email-and-messaging-solutions/helpdesk/resources/product-releases
• https://www.vulncheck.com/advisories/gfi-helpdesk-stored-xss-via-charset-parameter

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