{"id":"CVE-2025-6425","state":"PUBLISHED","title":"The WebCompat WebExtension shipped with Firefox exposed a persistent UUID","description":"An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.","publishedAt":"2025-06-24T12:27:59.987Z","updatedAt":"2026-04-13T14:26:06.659Z","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":"115.25","status":"unaffected","lessThanOrEqual":"115.*","versionType":"rpm"},{"version":"128.12","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"140","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"128.12","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"140","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1717672","https://www.mozilla.org/security/advisories/mfsa2025-51/","https://www.mozilla.org/security/advisories/mfsa2025-52/","https://www.mozilla.org/security/advisories/mfsa2025-53/","https://www.mozilla.org/security/advisories/mfsa2025-54/","https://www.mozilla.org/security/advisories/mfsa2025-55/","https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html","https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html"],"weaknesses":["CWE-200"],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/6xxx/CVE-2025-6425.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-6425","state":"PUBLISHED","datePublished":"2025-06-24T12:27:59.987Z","dateUpdated":"2026-04-13T14:26:06.659Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2025-06-20T14:51:28.050Z"},"containers":{"cna":{"title":"The WebCompat WebExtension shipped with Firefox exposed a persistent UUID","descriptions":[{"lang":"en","value":"An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12."}],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"115.25","status":"unaffected","lessThanOrEqual":"115.*","versionType":"rpm"},{"version":"128.12","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"140","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"128.12","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"140","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1717672"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-51/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-52/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-53/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-54/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-55/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-04-13T14:26:06.659Z"},"credits":[{"lang":"en","value":"Rob Wu"}]},"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":"2025-06-25T14:21:41.910497Z","id":"CVE-2025-6425","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-200","type":"CWE","lang":"en","description":"CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-06-25T14:30:48.734Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T20:07:00.354Z"}}]}}}