Vulnerability-Lookup

GHSA-98GQ-CQ48-6GCM

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

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.

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

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{
  "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"
    }
  ]
}

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

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

Summary

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

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)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44392",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-20T13:03:54.098462Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-20T13:04:04.783Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "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)"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
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        {
          "cvssV4_0": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "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",
            "version": "4.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "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"
}

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.

Action not permitted

GHSA-98GQ-CQ48-6GCM

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

Tags

Sightings

Nomenclature