CVE-2026-23753 GFI HelpDesk < 4.99.9 Stored XSS via charset Parameter
An authenticated administrator can inject arbitrary JavaScript via the charset parameter, leading to code execution in other administrators' browsers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-23753?
CVE-2026-23753 is a medium-severity cross-site scripting vulnerability in GFI Software HelpDesk, published on 20 Apr 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-23753?
It affects 1 product.
Products include Gfi Helpdesk.
How do I fix CVE-2026-23753?
No fix has been published for CVE-2026-23753 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-23753 being exploited?
There is no known exploitation of CVE-2026-23753 in the wild and no public exploit code.
Other vulnerabilities in GFI Software HelpDesk
Sources
Also known as GHSA-xj4v-3q69-qpxx.