CVE-2024-3863 Security feature bypass in Firefox

What is CVE-2024-3863?

CVE-2024-3863 is a critical vulnerability in Mozilla Firefox, published on 16 Apr 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The executable file warning was not presented when downloading .xrm-ms files. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Weakness: CWE-434

Which versions are affected by CVE-2024-3863?

It affects 2 products.

Products include Mozilla Firefox, Mozilla Thunderbird.

How do I fix CVE-2024-3863?

Upgrade to a fixed version.

Is CVE-2024-3863 being exploited?

There is no known exploitation of CVE-2024-3863 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-3vhm-v3w9-8mr8.