{"id":"CVE-2025-1019","title":"The z-order of the browser windows could be manipulated to hide the fullscreen notification","summary":"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 was fixed in Firefox 135 and Thunderbird 135.","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","cwe":["CWE-1021","CWE-1021"],"vendor":"mozilla","product":"firefox","affected":["firefox < 135.0","thunderbird >= 131.0, < 135.0"],"patched":["firefox 135.0","thunderbird 135.0"],"published":"2025-02-04","updated":"2026-09-30","sourceUpdated":"2026-09-30T19:10:01.007","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-1019","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1940162","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-07/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-11/","label":"security@mozilla.org"}],"tags":["nvd"],"epss":0.00362,"epssPercentile":0.27632,"ingestedAt":"2026-09-30T19:21:07.225Z","slug":"CVE-2025-1019","body":"## Overview\n\nThe 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 was fixed in Firefox 135 and Thunderbird 135.\n\n## Affected\n\n- `firefox < 135.0`\n- `thunderbird >= 131.0, < 135.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 135.0`\n- `thunderbird 135.0`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}