{"id":"CVE-2025-4087","state":"PUBLISHED","title":"Unsafe attribute access during XPath parsing","description":"A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.","publishedAt":"2025-04-29T13:13:42.302Z","updatedAt":"2026-04-13T14:27:21.172Z","severity":{"score":4.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/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":"128.10","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"138","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"128.10","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"138","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1952465","https://www.mozilla.org/security/advisories/mfsa2025-28/","https://www.mozilla.org/security/advisories/mfsa2025-29/","https://www.mozilla.org/security/advisories/mfsa2025-31/","https://www.mozilla.org/security/advisories/mfsa2025-32/","https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:09:23.771Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/4xxx/CVE-2025-4087.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-4087","state":"PUBLISHED","datePublished":"2025-04-29T13:13:42.302Z","dateUpdated":"2026-04-13T14:27:21.172Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2025-04-29T13:13:41.617Z"},"containers":{"cna":{"title":"Unsafe attribute access during XPath parsing","descriptions":[{"lang":"en","value":"A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10."}],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"128.10","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"138","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"128.10","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"138","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1952465"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-28/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-29/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-31/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-32/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-04-13T14:27:21.172Z"},"credits":[{"lang":"en","value":"Ivan Fratric"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":4.8,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-04-29T15:51:33.871165Z","id":"CVE-2025-4087","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","type":"CWE","lang":"en","description":"CWE-125 Out-of-bounds Read"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-09-23T14:54:08.076Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T19:58:51.757Z"}}]}}}