XSS in Gfi Helpdesk
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (3.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Gfi Helpdesk
- Gfi Software Helpdesk — versions 0
Weakness classification (CWE)
References
- gfi.ai/products-and-solutions/email-and-messaging-solutions/helpdesk/resources/… (vendor-advisory, Release Notes, patch)
- www.vulncheck.com/advisories/gfi-helpdesk-stored-xss-via-charset-parameter (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-23753?
- CVE-2026-23753 is a medium-severity vulnerability in Gfi Helpdesk, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-04-20.
- How severe is CVE-2026-23753?
- Medium severity. CVSS v3 base score is 4.8 out of 10.