Vulnerability in Mozilla Firefox
CVE-2025-14328
Privilege escalation in the Netmonitor component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (31.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Mozilla Firefox — versions 140.6, 146
- Mozilla Thunderbird — versions 140.6, 146
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2025-92/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2025-94/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2025-95/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2025-96/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-14328?
- CVE-2025-14328 is a high-severity vulnerability in Mozilla Firefox. CVSS score: 8.8/10. Published 2025-12-09.
- How severe is CVE-2025-14328?
- High severity. CVSS v3 base score is 8.8 out of 10.