CVE-2025-13019

HIGH

Mozilla Firefox < 140.5.0 - Permissive CORS Policy

Title source: rule

Description

Same-origin policy bypass in the DOM: Workers component. This vulnerability affects Firefox < 145, Firefox ESR < 140.5, Thunderbird < 145, and Thunderbird < 140.5.

References (5)

[Permissions Required] https://bugzilla.mozilla.org/show_bug.cgi?id=1988412

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2025-87/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2025-88/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2025-90/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2025-91/

Scores

CVSS v3 8.1

EPSS 0.0004

EPSS Percentile 13.2%

Attack Vector NETWORK

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

Classification

CWE

CWE-942

Status published

Affected Products (2)

mozilla/firefox < 140.5.0

mozilla/firefox < 145.0

Timeline

Published Nov 11, 2025

Tracked Since Feb 18, 2026