CVE-2019-18653: Avast Antivirus

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

A Cross Site Scripting (XSS) issue exists in Avast AntiVirus (Free, Internet Security, and Premiere Edition) 19.3.2369 build 19.3.4241.440 in the Network Notification Popup, allowing an attacker to execute JavaScript code via an SSID Name.

Affected products

• Avast Antivirus: version 19.3.2369 only

Published 2019-11-01. Last modified 2026-06-17.