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CVE-2025-13019

High

Description

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

SeverityHigh
CVSS8.1
Exploit probability—
ProductMozilla Firefox
PublishedNov 11, 2025
First seenNov 11, 2025
Weakness typeCWE-942CWE-942

How to fix

Update
  • mozilla firefox140.5.0, 145.0 or later

Affected products

ProductAffected versionsFixed in
mozilla firefoxv < 140.5.0, v < 145.0140.5.0, 145.0

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