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8.1 High

CVE-2025-13018 Mitigation bypass in the DOM: Security component

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Thunderbird 145, and Thunderbird 140.5.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 145	earliest → < 145	145
Firefox 140.5	earliest → < 140.5	140.5
Firefox ESR 140.5	earliest → < 140.5	140.5
Thunderbird 145	earliest → < 145	145
Thunderbird 140.5	earliest → < 140.5	140.5

References

bugzilla.mozilla.org bugzilla.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org

Timeline

Published November 11, 2025
Last modified April 13, 2026

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