{"id":"CVE-2025-4086","state":"PUBLISHED","title":"Specially crafted filename could be used to obscure download type","description":"A specially crafted filename containing a large number of encoded newline characters could obscure the file's extension when displayed in the download dialog.\n*This bug only affects Thunderbird for Android. Other versions of Thunderbird are unaffected.*. This vulnerability was fixed in Firefox 138 and Thunderbird 138.","publishedAt":"2025-04-29T13:13:40.899Z","updatedAt":"2026-04-13T14:28:45.158Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","source":"CISA-ADP"},"assigner":"mozilla","products":["Mozilla Firefox","Mozilla Thunderbird"],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"138","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"138","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1945705","https://www.mozilla.org/security/advisories/mfsa2025-28/","https://www.mozilla.org/security/advisories/mfsa2025-31/"],"weaknesses":["CWE-451"],"ingestedAt":"2026-10-29T20:09:23.771Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/4xxx/CVE-2025-4086.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-4086","state":"PUBLISHED","datePublished":"2025-04-29T13:13:40.899Z","dateUpdated":"2026-04-13T14:28:45.158Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2025-04-29T13:13:40.209Z"},"containers":{"cna":{"title":"Specially crafted filename could be used to obscure download type","descriptions":[{"lang":"en","value":"A specially crafted filename containing a large number of encoded newline characters could obscure the file's extension when displayed in the download dialog.\n*This bug only affects Thunderbird for Android. Other versions of Thunderbird are unaffected.*. This vulnerability was fixed in Firefox 138 and Thunderbird 138."}],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"138","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"138","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1945705"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-28/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-31/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-04-13T14:28:45.158Z"},"credits":[{"lang":"en","value":"Hafiizh"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.5,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-04-29T15:53:35.848720Z","id":"CVE-2025-4086","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-451","type":"CWE","lang":"en","description":"CWE-451 User Interface (UI) Misrepresentation of Critical Information"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-04-29T15:55:21.119Z"}}]}}}