{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-11712","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","state":"PUBLISHED","assignerShortName":"mozilla","dateReserved":"2025-10-13T19:50:07.919Z","datePublished":"2025-10-14T12:27:35.544Z","dateUpdated":"2026-04-13T14:29:40.795Z"},"containers":{"cna":{"affected":[{"product":"Firefox","vendor":"Mozilla","versions":[{"status":"unaffected","version":"140.4","lessThanOrEqual":"140.*","versionType":"rpm"},{"status":"unaffected","version":"144","lessThanOrEqual":"*","versionType":"rpm"}]},{"product":"Thunderbird","vendor":"Mozilla","versions":[{"status":"unaffected","version":"140.4","lessThanOrEqual":"140.*","versionType":"rpm"},{"status":"unaffected","version":"144","lessThanOrEqual":"*","versionType":"rpm"}]}],"descriptions":[{"lang":"en","value":"A malicious page could have used the type attribute of an OBJECT tag to override the default browser behavior when encountering a web resource served without a content-type. This could have contributed to an XSS on a site that unsafely serves files without a content-type header. This vulnerability was fixed in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.","supportingMedia":[{"type":"text/html","base64":false,"value":"A malicious page could have used the type attribute of an OBJECT tag to override the default browser behavior when encountering a web resource served without a content-type. This could have contributed to an XSS on a site that unsafely serves files without a content-type header. This vulnerability was fixed in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4."}]}],"title":"An OBJECT tag type attribute overrode browser behavior on web resources without a content-type","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1979536"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-81/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-83/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-84/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-85/"}],"credits":[{"lang":"en","value":"Masato Kinugawa"}],"providerMetadata":{"orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","shortName":"mozilla","dateUpdated":"2026-04-13T14:29:40.795Z"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-116","lang":"en","description":"CWE-116 Improper Encoding or Escaping of Output"}]}],"metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":6.1,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-10-15T13:21:51.563465Z","id":"CVE-2025-11712","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-10-15T13:28:24.592Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00031.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00015.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T17:31:51.952Z"}}]}}