{"id":"CVE-2025-3859","state":"PUBLISHED","title":"Firefox Focus elide URL allows address bar spoofing","description":"Websites directing users to long URLs that caused eliding to occur in the location view could leverage the truncating behavior to potentially trick users into thinking they were on a different webpage. This vulnerability was fixed in Focus 138.","publishedAt":"2025-04-30T16:30:18.670Z","updatedAt":"2026-04-13T14:28:36.100Z","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 Focus"],"affected":[{"vendor":"Mozilla","product":"Focus","versions":[{"version":"138","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1951533","https://www.mozilla.org/security/advisories/mfsa2025-33/"],"weaknesses":["CWE-451"],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/3xxx/CVE-2025-3859.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-3859","state":"PUBLISHED","datePublished":"2025-04-30T16:30:18.670Z","dateUpdated":"2026-04-13T14:28:36.100Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2025-04-21T16:01:02.407Z"},"containers":{"cna":{"title":"Firefox Focus elide URL allows address bar spoofing","descriptions":[{"lang":"en","value":"Websites directing users to long URLs that caused eliding to occur in the location view could leverage the truncating behavior to potentially trick users into thinking they were on a different webpage. This vulnerability was fixed in Focus 138."}],"affected":[{"vendor":"Mozilla","product":"Focus","versions":[{"version":"138","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1951533"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-33/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-04-13T14:28:36.100Z"},"credits":[{"lang":"en","value":"James Lee"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":4.3,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","integrityImpact":"NONE","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-04-30T17:13:54.226201Z","id":"CVE-2025-3859","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":"2025-05-12T15:49:52.650Z"}}]}}}