Vulnerability-Lookup

CVE-2026-44392 (GCVE-0-2026-44392)

Vulnerability from cvelistv5 – Published: 2026-05-20 05:28 – Updated: 2026-05-20 13:04

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.

Severity

4.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

5.3 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-862 - Missing authorization

Assigner

jpcert

References

3 references

URL	Tags
https://movabletype.org/news/2026/05/mt-908-relea…
https://www.sixapart.jp/movabletype/news/2026/05/…
https://jvn.jp/en/jp/JVN66473735/

Impacted products

14 products

Vendor	Product	Version
Six Apart Ltd.	Movable Type	Affected: 9.1.1 and earlier
Six Apart Ltd.	Movable Type	Affected: 9.0.7 and earlier
Six Apart Ltd.	Movable Type	Affected: 8.8.3 and earlier
Six Apart Ltd.	Movable Type	Affected: 8.0.10 and earlier
Six Apart Ltd.	Movable Type Advanced	Affected: 9.1.1 and earlie
Six Apart Ltd.	Movable Type Advanced	Affected: 9.0.7 and earlier
Six Apart Ltd.	Movable Type Advanced	Affected: 8.8.3 and earlier
Six Apart Ltd.	Movable Type Advanced	Affected: 8.0.10 and earlier
Six Apart Ltd.	Movable Type Premium	Affected: 9.1.1 and earlier
Six Apart Ltd.	Movable Type Premium	Affected: 9.0.7 and earlier
Six Apart Ltd.	Movable Type Premium	Affected: 2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier)
Six Apart Ltd.	Movable Type Premium (Advanced Edition)	Affected: 9.1.1 and earlier
Six Apart Ltd.	Movable Type Premium (Advanced Edition)	Affected: 9.0.7 and earlier
Six Apart Ltd.	Movable Type Premium (Advanced Edition)	Affected: 2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-44392

Vulnerability from fkie_nvd - Published: 2026-05-20 07:16 - Updated: 2026-06-17 10:50

Severity

4.3 (Medium) - CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	vultures@jpcert.or.jp	https://jvn.jp/en/jp/JVN66473735/
	vultures@jpcert.or.jp	https://movabletype.org/news/2026/05/mt-908-released.html
	vultures@jpcert.or.jp	https://www.sixapart.jp/movabletype/news/2026/05/20-1100.html

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "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",
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            {
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              "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."
    }
  ],
  "id": "CVE-2026-44392",
  "lastModified": "2026-06-17T10:50:35.127",
  "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"
    }
  ]
}

GHSA-98GQ-CQ48-6GCM

Vulnerability from github – Published: 2026-05-20 09:30 – Updated: 2026-05-20 09:30

Details

Severity

4.3 (Medium)


                  
                    CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

5.3 (Medium)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-44392"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-20T07:16:15Z",
    "severity": "MODERATE"
  },
  "details": "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": "GHSA-98gq-cq48-6gcm",
  "modified": "2026-05-20T09:30:34Z",
  "published": "2026-05-20T09:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44392"
    },
    {
      "type": "WEB",
      "url": "https://jvn.jp/en/jp/JVN66473735"
    },
    {
      "type": "WEB",
      "url": "https://movabletype.org/news/2026/05/mt-908-released.html"
    },
    {
      "type": "WEB",
      "url": "https://www.sixapart.jp/movabletype/news/2026/05/20-1100.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

JVNDB-2026-000076

Vulnerability from jvndb - Published: 2026-05-20 15:21 - Updated:2026-05-20 15:21

Severity

4.3 (Medium) - cvssV3_0 - CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Summary

Movable Type vulnerable to missing authorization

Details

Movable Type provided by Six Apart Ltd. contains the following vulnerability.

Missing authorization (CWE-862) - CVE-2026-44392

Six Apart Ltd. reported this vulnerability to JPCERT/CC to notify users of its solution through JVN. JPCERT/CC and Six Apart Ltd. coordinated under the Information Security Early Warning Partnership.

References

Type

URL

	JVN	https://jvn.jp/en/jp/JVN56484285/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-44392
	No Mapping(CWE-Other)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

	Six Apart, Ltd.	Movable Type
	Six Apart, Ltd.	Movable Type Advanced
	Six Apart, Ltd.	Movable Type Premium
	Six Apart, Ltd.	Movable Type Premium (Advanced Edition)

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000076.html",
  "dc:date": "2026-05-20T15:21+09:00",
  "dcterms:issued": "2026-05-20T15:21+09:00",
  "dcterms:modified": "2026-05-20T15:21+09:00",
  "description": "Movable Type provided by Six Apart Ltd. contains the following vulnerability.\u003ca href=\u0027https://cwe.mitre.org/data/definitions/862.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eMissing authorization (CWE-862) - CVE-2026-44392\u003c/li\u003e\u003c/ul\u003eSix Apart Ltd. reported this vulnerability to JPCERT/CC to notify users of its solution through JVN. JPCERT/CC and Six Apart Ltd. coordinated under the Information Security Early Warning Partnership.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000076.html",
  "sec:cpe": [
    {
      "#text": "cpe:/a:sixapart:movable_type",
      "@product": "Movable Type",
      "@vendor": "Six Apart, Ltd.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/a:sixapart:movable_type_advanced",
      "@product": "Movable Type Advanced",
      "@vendor": "Six Apart, Ltd.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/a:sixapart:movable_type_premium",
      "@product": "Movable Type Premium",
      "@vendor": "Six Apart, Ltd.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/a:sixapart:movable_type_premium_advanced",
      "@product": "Movable Type Premium (Advanced Edition)",
      "@vendor": "Six Apart, Ltd.",
      "@version": "2.2"
    }
  ],
  "sec:cvss": {
    "@score": "4.3",
    "@severity": "Medium",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000076",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN56484285/index.html",
      "@id": "JVN#56484285",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-44392",
      "@id": "CVE-2026-44392",
      "@source": "CVE"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "Movable Type vulnerable to missing authorization"
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2026-44392 (GCVE-0-2026-44392)

FKIE_CVE-2026-44392

GHSA-98GQ-CQ48-6GCM

JVNDB-2026-000076

Tags

Sightings

Nomenclature