Gfi · Gfi Helpdesk · CVE-2026-23758
**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 ticket subject field. Authenticated staff members can inject malicious JavaScript by manipulating the 'editsubject' POST parameter. This occurs due to inadequate sanitization in the `Controller Ticket.EditSubmit()` function, which bypasses the incomplete `SanitizeForXSS()` method, allowing arbitrary JavaScript execution when other staff members or administrators view the affected ticket.
**Recommendations**
Update to version 4.99.9 or later.
As a temporary workaround, restrict access to the `Controller Ticket.EditSubmit()` function or the 'editsubject' parameter to minimize the risk of exploitation.