CVE-2025-1018

Summary

CVE-2025-1018 is a vulnerability affecting Firefox version 134 and older, as well as Thunderbird version 134 and below. The issue lies in the fullscreen notification feature, which can be prematurely hidden if the user quickly requests fullscreen mode again. This quirk could potentially be exploited for spoofing attacks, allowing malicious actors to display misleading notifications to unsuspecting users.

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