What’s Vulnerable › Vulnerabilities

CVE-2024-8382

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-03 · updated 2026-06-17
• Weakness: CWE-273

Description

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; from 128.0 before 128.2 — fixed in 115.15, 128.2

How to fix

Upgrade to a fixed version: Mozilla Firefox 130.0; Mozilla Firefox ESR 115.15, 128.2. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1906744
• https://www.mozilla.org/security/advisories/mfsa2024-39/
• https://www.mozilla.org/security/advisories/mfsa2024-40/
• https://www.mozilla.org/security/advisories/mfsa2024-41/
• https://www.mozilla.org/security/advisories/mfsa2024-43/
• https://www.mozilla.org/security/advisories/mfsa2024-44/
• https://lists.debian.org/debian-lts-announce/2024/09/msg00012.html
• https://lists.debian.org/debian-lts-announce/2024/09/msg00025.html

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