CVE-2025-14327: Mozilla Firefox

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

Spoofing issue in the Downloads Panel component. This vulnerability was fixed in Firefox 146, Thunderbird 146, Firefox ESR 140.7, and Thunderbird 140.7.

Affected products

• Mozilla Firefox: before 146.0 (fixed in 146.0)
• Mozilla Thunderbird: before 146.0 (fixed in 146.0)

Published 2025-12-09. Last modified 2026-10-07.