CVE-2025-1018

HIGH 7.3

Fullscreen notification is not displayed when fullscreen is re-requested

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	mozilla
Product	firefox
Ecosystems	Browser JavaScript
Industries	Technology
Published	Feb 4, 2025
Last Updated	Apr 13, 2026

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Affected Versions

Mozilla / Firefox

All versions affected

Mozilla / Thunderbird

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=1910818 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-07/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-11/

Credits

Irvan Kurniawan