CVE-2025-13019

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.

CVSS 3.1

8.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 19% of CVEs (scores of 2026-10-25)

CWE

CWE-942

Published

2025-11-11

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

Affected

• mozilla:firefox

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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