PT-2026-33821 · Gfi · Gfi Helpdesk

Alex Williams + 1 · Published 2026-04-20 · Updated 2026-04-21 · CVE-2026-23753

Positive Technologies (AI Summary)

CVSS v3.1

4.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions GFI HelpDesk versions prior to 4.99.9

Description A stored cross-site scripting issue exists in the language management functionality. The 'charset' POST parameter is passed directly to the SWIFT Language::Create() function without HTML sanitization and is later rendered unsanitized by View Language.RenderGrid(). This allows an authenticated administrator to inject arbitrary JavaScript through the charset field when creating or editing a language, which then executes in the browser of any administrator viewing the Languages page.

Recommendations Update to version 4.99.9 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-23753

Affected Products

Gfi Helpdesk

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-23753 · Security Note
• https://twitter.com/CVEnew/status/2046571913351508377 · Twitter Post
• https://vulncheck.com/advisories/gfi-helpdesk-stored-xss-via-charset-parameter · Note
• https://gfi.ai/products-and-solutions/email-and-messaging-solutions/helpdesk/resources/product-releases · Patch, Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2046333719661723686 · Twitter Post