Mozilla Firefox Security Updates – 10 December 2025

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Mozilla has released an updated Firefox version 146, Firefox ESR versions 115.31, and 140.6 to fix multiple vulnerabilities.

The addressed vulnerabilities could allow the attacker to bypass security restrictions, gain elevated privileges, corrupt memory, and gain access to the affected system by persuading the victim to visit a specially crafted website.

Sample of the addressed vulnerabilities:

1. Mozilla Firefox Privilege Escalation Vulnerability in the DOM Notifications Component (CVE-2025-14323):

  • CVSS: 8.8
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Consequences: Gain Privileges

2. Mozilla Firefox Memory Safety Bugs Vulnerability (CVE-2025-14333):

  • CVSS: 8.1
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Consequences: Gain Access
Vulnerabilities
  • CVE-2025-14321
  • CVE-2025-14322
  • CVE-2025-14323
  • CVE-2025-14324
  • CVE-2025-14325
  • CVE-2025-14326
  • CVE-2025-14327
  • CVE-2025-14328
  • CVE-2025-14329
  • CVE-2025-14330
  • CVE-2025-14331
  • CVE-2025-14332
  • CVE-2025-14333
Mitigations

The enterprise should deploy this patch as soon as the testing phase is completed.

Mozilla Firefox Security Advisory

References

Mozilla Firefox Security Advisory