CVE-2024-8382: Mozilla Firefox

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Internal browser event interfaces were exposed to web content when privileged EventHandler listener callbacks ran for those events. Web content that tried to use those interfaces would not be able to use them with elevated privileges, but their presence would indicate certain browser features had been used, such as when a user opened the Dev Tools console. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, Firefox ESR < 115.15, Thunderbird < 128.2, and Thunderbird < 115.15.

Affected products

• Mozilla Firefox: before 130.0 (fixed in 130.0)
• Mozilla Firefox ESR: before 115.15 (fixed in 115.15); from 128.0, before 128.2 (fixed in 128.2)

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