What’s Vulnerable › Vulnerabilities

CVE-2024-8388

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% 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-1021

Description

Multiple prompts and panels from both Firefox and the Android OS could be used to obscure the notification announcing the transition to fullscreen mode after the fix for CVE-2023-6870 in Firefox 121. This could lead to spoofing the browser UI if the sudden appearance of the prompt distracted the user from noticing the visual transition happening behind the prompt. These notifications now use the Android Toast feature. *This bug only affects Firefox on Android. Other operating systems are unaffected.* This vulnerability affects Firefox < 130.

Affected products

• Mozilla Firefox: before 130.0 — fixed in 130.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 130.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/buglist.cgi?bug_id=1839074%2C1865413%2C1868970%2C1873367%2C1877820%2C1884642%2C1886469%2C1894326%2C1894891%2C1897648
• https://bugzilla.mozilla.org/show_bug.cgi?id=1902996
• https://www.mozilla.org/security/advisories/mfsa2024-39/

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