{"id":"CVE-2025-5263","state":"PUBLISHED","title":"Error handling for script execution was incorrectly isolated from web content","description":"Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.","publishedAt":"2025-05-27T12:29:22.686Z","updatedAt":"2026-04-13T14:27:56.730Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","source":"CISA-ADP"},"assigner":"mozilla","products":["Mozilla Firefox","Mozilla Thunderbird"],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"115.24","status":"unaffected","lessThanOrEqual":"115.*","versionType":"rpm"},{"version":"128.11","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"139","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"128.11","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"139","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1960745","https://www.mozilla.org/security/advisories/mfsa2025-42/","https://www.mozilla.org/security/advisories/mfsa2025-43/","https://www.mozilla.org/security/advisories/mfsa2025-44/","https://www.mozilla.org/security/advisories/mfsa2025-45/","https://www.mozilla.org/security/advisories/mfsa2025-46/","https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html","https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html"],"weaknesses":["CWE-346"],"ingestedAt":"2026-10-29T20:09:39.787Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/5xxx/CVE-2025-5263.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-5263","state":"PUBLISHED","datePublished":"2025-05-27T12:29:22.686Z","dateUpdated":"2026-04-13T14:27:56.730Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2025-05-27T12:29:22.271Z"},"containers":{"cna":{"title":"Error handling for script execution was incorrectly isolated from web content","descriptions":[{"lang":"en","value":"Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. 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