Vulnerability in Mozilla Firefox
CVE-2025-14323
Privilege escalation in the DOM: Notifications component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
EPSS: 0.003 (26.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Mozilla Firefox — versions 115.31, 140.6, 146
- Mozilla Thunderbird — versions 140.6, 146
References
- security@mozilla.org (Permissions Required, Issue Tracking)
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-14323?
- CVE-2025-14323 is a high-severity vulnerability in Mozilla Firefox. CVSS score: 8.8/10. Published 2025-12-09.
- How severe is CVE-2025-14323?
- High severity. CVSS v3 base score is 8.8 out of 10.