Privilege Escalation in Firefox and Firefox ESR by Mozilla
CVE-2025-14329

8.8HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
9 December 2025

What is CVE-2025-14329?

A vulnerability exists in the Netmonitor component of Firefox and Firefox ESR that allows an attacker to escalate privileges, potentially enabling unauthorized actions within the affected application. This issue affects various versions of Firefox before 146 and Firefox ESR prior to 140.6, requiring users to upgrade to secure their systems against possible exploitation.

Affected Version(s)

Firefox < 146

Firefox ESR < 140.6

Thunderbird < 146

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1997018
https://www.mozilla.org/security/advisories/mfsa2025-92/
https://www.mozilla.org/security/advisories/mfsa2025-94/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

satrya wira yudha
JSON
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CVE-2025-14329 : Privilege Escalation in Firefox and Firefox ESR by Mozilla