CVE-2026-0483 Stored Cross-Site Scripting (XSS) vulnerability in LiveHelperChat
Attackers can execute arbitrary JavaScript in user contexts by uploading malicious PDF files to Live Helper Chat.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-0483?
CVE-2026-0483 is a medium-severity cross-site scripting vulnerability in LiveHelperChat, published on 28 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Stored Cross-Site Scripting (XSS) vulnerability in the PDF file upload functionality of Live Helper Chat, versions prior to 4.72. An attacker can upload a malicious PDF file containing an XSS payload, which will be executed in the user's context when they download and open the file via the link generated by the application. The vulnerability allows arbitrary JavaScript code to be executed in the user's local context.
Weakness: CWE-79
Which versions are affected by CVE-2026-0483?
How do I fix CVE-2026-0483?
No fix has been published for CVE-2026-0483 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-2026-0483 being exploited?
There is no known exploitation of CVE-2026-0483 in the wild and no public exploit code.
Sources
Also known as GHSA-g2xg-qw63-fpx3.