JIT Miscompilation in Firefox and Firefox ESR by Mozilla
CVE-2025-14325

7.3HIGH

Key Information:

Vendor

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

What is CVE-2025-14325?

A vulnerability in the Just-In-Time (JIT) compilation component of Firefox's JavaScript Engine has been identified. This issue affects versions of Firefox prior to 146 and Firefox ESR prior to 140.6, potentially leading to unexpected behavior or exploitation through malicious scripts. Users are recommended to update their browsers to the latest versions to ensure security and functionality.

Affected Version(s)

Firefox < 146

Firefox ESR < 140.6

Thunderbird < 146

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1998050
https://www.mozilla.org/security/advisories/mfsa2025-92/
https://www.mozilla.org/security/advisories/mfsa2025-94/

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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JSON
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CVE-2025-14325 : JIT Miscompilation in Firefox and Firefox ESR by Mozilla