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 · CISA-ADP (v2.0.3)

Decision recorded 2026-05-20 13:03 UTC

CWE

CWE-862 - Missing authorization

Assigner

jpcert CNA under the jpcert root

CNA scorecard C 64/100 over 186 records in the last 180 days details

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	CPE status
Six Apart Ltd.	Movable Type	Affected: 9.1.1 and earlier	guessed
Six Apart Ltd.	Movable Type	Affected: 9.0.7 and earlier	guessed
Six Apart Ltd.	Movable Type	Affected: 8.8.3 and earlier	guessed
Six Apart Ltd.	Movable Type	Affected: 8.0.10 and earlier	guessed
Six Apart Ltd.	Movable Type Advanced	Affected: 9.1.1 and earlie	guessed
Six Apart Ltd.	Movable Type Advanced	Affected: 9.0.7 and earlier	guessed
Six Apart Ltd.	Movable Type Advanced	Affected: 8.8.3 and earlier	guessed
Six Apart Ltd.	Movable Type Advanced	Affected: 8.0.10 and earlier	guessed
Six Apart Ltd.	Movable Type Premium	Affected: 9.1.1 and earlier	guessed
Six Apart Ltd.	Movable Type Premium	Affected: 9.0.7 and earlier	guessed
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)	guessed
Six Apart Ltd.	Movable Type Premium (Advanced Edition)	Affected: 9.1.1 and earlier	guessed
Six Apart Ltd.	Movable Type Premium (Advanced Edition)	Affected: 9.0.7 and earlier	guessed
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)	guessed

Show details on NVD website

JSON

To clipboard

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                {
                  "lang": "en-US",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-862",
                  "description": "Missing authorization",
                  "lang": "en-US",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-20T05:28:14.892Z",
            "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
            "shortName": "jpcert"
          },
          "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/"
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "assignerShortName": "jpcert",
        "cveId": "CVE-2026-44392",
        "datePublished": "2026-05-20T05:28:14.892Z",
        "dateReserved": "2026-05-18T05:54:22.563Z",
        "dateUpdated": "2026-05-20T13:04:04.783Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-44392

Vulnerability from fkie_nvd - Published: 2026-05-20 07:16 - Updated: 2026-07-24 10:10

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",
          "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"
    }
  ]
}

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 06:21 - Updated:2026-05-20 06:21

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

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

FKIE_CVE-2026-44392

GHSA-98GQ-CQ48-6GCM

JVNDB-2026-000076

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour