CVE-2024-0605: Mozilla Firefox Focus

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Using a javascript: URI with a setTimeout race condition, an attacker can execute unauthorized scripts on top origin sites in urlbar. This bypasses security measures, potentially leading to arbitrary code execution or unauthorized actions within the user's loaded webpage. This vulnerability affects Focus for iOS < 122.

Affected products

• Mozilla Firefox Focus: before 122.0 (fixed in 122.0)

Published 2024-01-22. Last modified 2026-06-17.