FKIE_CVE-2026-44392
Vulnerability from fkie_nvd - Published: 2026-05-20 07:16 - Updated: 2026-07-24 10:10
Severity
Summary
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.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"product": "Movable Type",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "9.1.1 and earlier"
}
]
},
{
"product": "Movable Type",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "9.0.7 and earlier"
}
]
},
{
"product": "Movable Type",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "8.8.3 and earlier"
}
]
},
{
"product": "Movable Type",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "8.0.10 and earlier"
}
]
},
{
"product": "Movable Type Advanced",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "9.1.1 and earlie"
}
]
},
{
"product": "Movable Type Advanced",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "9.0.7 and earlier"
}
]
},
{
"product": "Movable Type Advanced",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "8.8.3 and earlier"
}
]
},
{
"product": "Movable Type Advanced",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "8.0.10 and earlier"
}
]
},
{
"product": "Movable Type Premium",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "9.1.1 and earlier"
}
]
},
{
"product": "Movable Type Premium",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "9.0.7 and earlier"
}
]
},
{
"product": "Movable Type Premium",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier)"
}
]
},
{
"product": "Movable Type Premium (Advanced Edition)",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "9.1.1 and earlier"
}
]
},
{
"product": "Movable Type Premium (Advanced Edition)",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "9.0.7 and earlier"
}
]
},
{
"product": "Movable Type Premium (Advanced Edition)",
"vendor": "Six Apart Ltd.",
"versions": [
{
"status": "affected",
"version": "2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier)"
}
]
}
],
"source": "vultures@jpcert.or.jp"
}
],
"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."
},
{
"lang": "es",
"value": "Vulnerabilidad de falta de autorizaci\u00f3n existe en Movable Type. Bajo ciertas condiciones, cuando un usuario sin privilegios de administrador inicia sesi\u00f3n en el producto, se puede ejecutar un procesamiento de actualizaci\u00f3n no intencionado."
}
],
"id": "CVE-2026-44392",
"lastModified": "2026-07-24T10:10:00.197",
"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"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-44392",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-20T13:03:54.098462Z",
"version": "2.0.3"
}
}
]
},
"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": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-862"
}
],
"source": "vultures@jpcert.or.jp",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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