CVE-2025-1019 – Mozilla Firefox Browser Window Z-Order Manipulation Spoofing Vulnerability

The following table lists the changes that have been made to the
CVE-2025-1019 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Feb. 04, 2025

    Action Type Old Value New Value
    Added Description The z-order of the browser windows could be manipulated to hide the fullscreen notification. This could potentially be leveraged to perform a spoofing attack. This vulnerability affects Firefox < 135 and Thunderbird < 135.
    Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1940162
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-07/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-11/
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