CVE-2025-14331
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-09

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description
Same-origin policy bypass in the Request Handling component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-12-09
Last Modified
2026-04-13
Generated
2026-06-16
AI Q&A
2025-12-10
EPSS Evaluated
2026-06-14
NVD
CVE-2025-14331
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
mozilla firefox to 115.31.0 (exc)
mozilla firefox to 146.0 (exc)
mozilla firefox From 116.0 (inc) to 140.6.0 (exc)
mozilla thunderbird to 140.6.0 (exc)
mozilla thunderbird to 146.0 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-346 The product does not properly verify that the source of data or communication is valid.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Mitigation Strategies

To mitigate this vulnerability, update Firefox to version 146 or later, or Firefox ESR to version 115.31 or later, or Firefox ESR to version 140.6 or later, as these versions include fixes for the same-origin policy bypass in the Request Handling component. [3]

Executive Summary

This vulnerability is a same-origin policy bypass in the Request Handling component of Firefox browsers. It affects versions of Firefox earlier than 146 and Firefox ESR versions earlier than 115.31 and 140.6. The same-origin policy is a security measure that restricts how documents or scripts loaded from one origin can interact with resources from another origin. Bypassing this policy can allow unauthorized access to data or actions across different origins.

Impact Analysis

By bypassing the same-origin policy, this vulnerability could allow malicious websites or scripts to access or manipulate data from other websites without proper authorization. This can lead to data theft, unauthorized actions, or compromise of user privacy and security when using affected versions of Firefox.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2025-14331. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart