Description
Mitigation bypass in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Firefox ESR 115.30, Thunderbird 145, and Thunderbird 140.5.
Affected products
mozilla: firefox
References6
- www.mozilla.org/security/advisories/mfsa2025-87/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-88/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-89/ Vendor Advisory
- bugzilla.mozilla.org/show_bug.cgi?id=1991945 Permissions Required
- www.mozilla.org/security/advisories/mfsa2025-90/
- www.mozilla.org/security/advisories/mfsa2025-91/
Metrics
- CVSS 3.1
-
6.1
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 12 · as of 10 November 2026
- CWE
- CWE-288
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