{"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": "2026-05-20T05:28:14.892Z"}, "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-44392", "lastModified": "2026-05-20T07:16:15.317", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.0"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "vultures@jpcert.or.jp", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "vultures@jpcert.or.jp", "type": "Secondary"}]}, "published": "2026-05-20T07:16:15.317", "references": [{"source": "vultures@jpcert.or.jp", "url": "https://jvn.jp/en/jp/JVN66473735/"}, {"source": "vultures@jpcert.or.jp", "url": "https://movabletype.org/news/2026/05/mt-908-released.html"}, {"source": "vultures@jpcert.or.jp", "url": "https://www.sixapart.jp/movabletype/news/2026/05/20-1100.html"}], "sourceIdentifier": "vultures@jpcert.or.jp", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "vultures@jpcert.or.jp", "type": "Primary"}]}

{}

{"created": "2026-05-20T07:30:25.323477+00:00", "title": "Missing Authorization Allows Unintended Updates in Movable Type", "updated": "2026-05-20T07:30:25.323490+00:00", "vendors": []}