CVE-2025-13019

Same-origin policy bypass in the DOM: Workers component

State: Published
Severity: 8.1 High
Published: Nov 11, 2025
Updated: Apr 13, 2026
Reserved: Nov 11, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N	CISA-ADP

Weaknesses

CWE-942 Permissive Cross-domain Policy with Untrusted Domains

Affected Products

Product	Versions
FirefoxMozilla	140.5 through 140.*Not affected 145 and laterNot affected
ThunderbirdMozilla	140.5 through 140.*Not affected 145 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1988412
https://www.mozilla.org/security/advisories/mfsa2025-87/
https://www.mozilla.org/security/advisories/mfsa2025-88/
https://www.mozilla.org/security/advisories/mfsa2025-90/
https://www.mozilla.org/security/advisories/mfsa2025-91/

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