CVE-2020-9758: Livezilla

Critical severity, CVSS 9.6. EPSS: 2.5% chance of exploitation in the next 30 days.

An issue was discovered in chat.php in LiveZilla Live Chat 8.0.1.3 (Helpdesk). A blind JavaScript injection lies in the name parameter. Triggering this can fetch the username and passwords of the helpdesk employees in the URI. This leads to a privilege escalation, from unauthenticated to user-level access, leading to full account takeover. The attack fetches multiple credentials because they are stored in the database (stored XSS). This affects the mobile/chat URI via the lgn and psswrd parameters.

Affected products

• Livezilla Livezilla: before 8.0.1.3 (fixed in 8.0.1.3)

Published 2020-03-09. Last modified 2026-06-17.