Information disclosure in Mozilla Firefox
CVE-2025-6432
When Multi-Account Containers was enabled, DNS requests could have bypassed a SOCKS proxy when the domain name was invalid or the SOCKS proxy was not responding. This vulnerability was fixed in Firefox 140 and Thunderbird 140.
Vulnerability class: Information Disclosure
EPSS: 0.003 (21.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L.
Affected products
- Mozilla Firefox — versions 140
- Mozilla Thunderbird — versions 140
Weakness classification (CWE)
References
- security@mozilla.org (Permissions Required)
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org
Frequently asked questions
- What is CVE-2025-6432?
- CVE-2025-6432 is a high-severity vulnerability in Mozilla Firefox, classified under Information Disclosure. CVSS score: 8.6/10. Published 2025-06-24.
- How severe is CVE-2025-6432?
- High severity. CVSS v3 base score is 8.6 out of 10.