{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-44392","assignerOrgId":"ede6fdc4-6654-4307-a26d-3331c018e2ce","state":"PUBLISHED","assignerShortName":"jpcert","dateReserved":"2026-05-18T05:54:22.563Z","datePublished":"2026-05-20T05:28:14.892Z","dateUpdated":"2026-05-20T13:04:04.783Z"},"containers":{"cna":{"affected":[{"vendor":"Six Apart Ltd.","product":"Movable Type","versions":[{"version":"9.1.1 and earlier","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type","versions":[{"version":"9.0.7 and earlier","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type","versions":[{"version":"8.8.3 and earlier","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type","versions":[{"version":"8.0.10 and earlier","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type Advanced","versions":[{"version":"9.1.1 and earlie","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type Advanced","versions":[{"version":"9.0.7 and earlier","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type Advanced","versions":[{"version":"8.8.3 and earlier","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type Advanced","versions":[{"version":"8.0.10 and earlier","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type Premium","versions":[{"version":"9.1.1 and earlier","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type Premium","versions":[{"version":"9.0.7 and earlier","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type Premium","versions":[{"version":"2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier)","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type Premium (Advanced Edition)","versions":[{"version":"9.1.1 and earlier","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type Premium (Advanced Edition)","versions":[{"version":"9.0.7 and earlier","status":"affected"}]},{"vendor":"Six Apart Ltd.","product":"Movable Type Premium (Advanced Edition)","versions":[{"version":"2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier)","status":"affected"}]}],"descriptions":[{"lang":"en","value":"Missing authorization vulnerability exists in Movable Type. Under certain conditions, when a user without administrator privileges signs in to the product, unintended update processing may be executed."}],"problemTypes":[{"descriptions":[{"description":"Missing authorization","lang":"en-US","cweId":"CWE-862","type":"CWE"}]}],"references":[{"url":"https://movabletype.org/news/2026/05/mt-908-released.html"},{"url":"https://www.sixapart.jp/movabletype/news/2026/05/20-1100.html"},{"url":"https://jvn.jp/en/jp/JVN66473735/"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_0":{"version":"3.0","baseSeverity":"MEDIUM","baseScore":4.3,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"}},{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV4_0":{"version":"4.0","baseSeverity":"MEDIUM","baseScore":5.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}}],"providerMetadata":{"orgId":"ede6fdc4-6654-4307-a26d-3331c018e2ce","shortName":"jpcert","dateUpdated":"2026-05-20T05:28:14.892Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-20T13:03:54.098462Z","id":"CVE-2026-44392","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":"2026-05-20T13:04:04.783Z"}}]}}