CVE-2025-1018highCWE-1021

CVE-2025-1018: high-severity vulnerability in Mozilla Firefox

Fullscreen notification is not displayed when fullscreen is re-requested

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.3epss 0.4%
The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected products
Mozilla · FirefoxMozilla · Thunderbird
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