CVE-2024-9391 Security feature bypass in Firefox

What is CVE-2024-9391?

CVE-2024-9391 is a medium-severity vulnerability in Mozilla Firefox, published on 1 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A user who enables full-screen mode on a specially crafted web page could potentially be prevented from exiting full screen mode. This may allow spoofing of other sites as the address bar is no longer visible. *This bug only affects Firefox Focus for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 131.

Weakness: CWE-290

Which versions are affected by CVE-2024-9391?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2024-9391?

Upgrade to a fixed version.

Is CVE-2024-9391 being exploited?

There is no known exploitation of CVE-2024-9391 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-p5hw-4fxj-g4x6.