CVE-2024-8386: Mozilla Firefox

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

If a site had been granted the permission to open popup windows, it could cause Select elements to appear on top of another site to perform a spoofing attack. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Thunderbird < 128.2.

Affected products

• Mozilla Firefox: before 130.0 (fixed in 130.0)
• Mozilla Firefox ESR: before 128.2 (fixed in 128.2)

Published 2024-09-03. Last modified 2026-06-17.