CVE-2025-14331

6.5 MEDIUM

Published: December 09, 2025 Modified: April 13, 2026

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://bugzilla.mozilla.org/show_bug.cgi?id=2000218

Source: security@mozilla.org

Issue Tracking Permissions Required

https://www.mozilla.org/security/advisories/mfsa2025-92/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-93/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-94/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-95/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-96/

Source: security@mozilla.org

Vendor Advisory

6 reference(s) from NVD

Quick Stats

CVSS v3 Score

6.5 / 10.0

EPSS (Exploit Probability)

0.0%

14th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-346 CWE-346

Affected Vendors

mozilla

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