{"id":"CVE-2025-3029","title":"A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack","summary":"A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability was fixed in Firefox 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbir…","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-290"],"vendor":"mozilla","product":"firefox","affected":["firefox < 128.9.0","firefox < 137.0","thunderbird < 128.9.0","thunderbird >= 129.0, < 137.0"],"patched":["firefox 137.0","thunderbird 137.0"],"published":"2025-04-01","updated":"2026-09-30","sourceUpdated":"2026-09-30T18:10:00.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-3029","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1952213","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-20/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-22/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-23/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-24/","label":"security@mozilla.org"},{"url":"https://lists.debian.org/debian-lts-announce/2025/04/msg00005.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00342,"epssPercentile":0.25287,"ingestedAt":"2026-09-30T18:17:24.430Z","slug":"CVE-2025-3029","body":"## Overview\n\nA crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability was fixed in Firefox 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.\n\n## Affected\n\n- `firefox < 128.9.0`\n- `firefox < 137.0`\n- `thunderbird < 128.9.0`\n- `thunderbird >= 129.0, < 137.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 137.0`\n- `thunderbird 137.0`","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}