VulnerabilityModified
CVE-2025-13019
Same-origin policy bypass in the DOM: Workers component.
HIGH 8.1EPSS 0.26%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- EPSS
- 0.26% probability · 17th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-942
- Affected
- mozilla/firefox
- Source
- security@mozilla.org
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1988412Permissions Required
- 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/
- https://www.mozilla.org/security/advisories/mfsa2025-91/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.