CVE-2025-13019

HIGH
Published Nov 11, 2025 Modified Apr 13, 2026 CWE-942

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.

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CVSS v3.1 Score

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

Weakness Type (CWE)

CWE-942 CWE-942

Affected Products

Vendor Product
mozilla firefox
mozilla firefox

References

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 8.1 (HIGH).
How severe is CVE-2025-13019? +
CVE-2025-13019 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2025-13019? +
CVE-2025-13019 affects products from mozilla, specifically: firefox. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-13019? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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