PT-2026-33815 · Gfi · Helpdesk

Alex Williams + 1 · Published 2026-04-20 · Updated 2026-04-20 · CVE-2026-23758

Mitre

CVSS v4.0

6.4

Medium

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

GFI HelpDesk before 4.99.9 contains a stored cross-site scripting vulnerability in the ticket subject field that allows authenticated staff members to inject malicious JavaScript by manipulating the editsubject POST parameter. Attackers can inject XSS payloads through inadequate sanitization in Controller Ticket.EditSubmit() that bypass the incomplete SanitizeForXSS() method to execute arbitrary JavaScript when other staff members or administrators view the affected ticket.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-23758

Affected Products

Helpdesk

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-23758 · Security Note
• https://gfi.ai/products-and-solutions/email-and-messaging-solutions/helpdesk/resources/product-releases · Patch, Vendor Advisory
• https://vulncheck.com/advisories/gfi-helpdesk-stored-xss-via-editsubject-parameter · Note