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CVE-2026-23704

Status: DeferredMedium (5.1)—

A non-administrative user can upload malicious files. When an administrator or the product accesses that file, an arbitrary script may be executed on the administrator's browser. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Movabletype — Movable TypeAI

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-23704",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-23704",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-04T16:07:20.323679Z"
        }
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "vultures@jpcert.or.jp",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.0",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.7,
        "exploitabilityScore": 2.3
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "vultures@jpcert.or.jp",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 5.1,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L/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",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "PASSIVE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "LOW",
          "subIntegrityImpact": "LOW",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "LOW",
          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "vultures@jpcert.or.jp",
      "affectedData": [
        {
          "vendor": "Six Apart Ltd.",
          "product": "Movable Type (Software Edition)",
          "versions": [
            {
              "status": "affected",
              "version": "9.0.4 to 9.0.5 (9.0 series)"
            },
            {
              "status": "affected",
              "version": "8.8.0 to 8.8.1 (8.8 series)"
            },
            {
              "status": "affected",
              "version": "8.0.2 to 8.0.8 (8.0 series)"
            }
          ]
        },
        {
          "vendor": "Six Apart Ltd.",
          "product": "Movable Type Advanced (Software Edition)",
          "versions": [
            {
              "status": "affected",
              "version": "9.0.4 to 9.0.5 (9.0 series)"
            },
            {
              "status": "affected",
              "version": "8.8.0 to 8.8.1 (8.8 series)"
            },
            {
              "status": "affected",
              "version": "8.0.2 to 8.0.8 (8.0 series)"
            }
          ]
        },
        {
          "vendor": "Six Apart Ltd.",
          "product": "Movable Type Premium (Software Edition)",
          "versions": [
            {
              "status": "affected",
              "version": "9.0.4 (MTP 9.0 series)"
            },
            {
              "status": "affected",
              "version": "2.13 and earlier (MTP 2 series)"
            }
          ]
        },
        {
          "vendor": "Six Apart Ltd.",
          "product": "Movable Type Premium (Advanced Edition) (Software Edition)",
          "versions": [
            {
              "status": "affected",
              "version": "9.0.4 (MTP 9.0 series)"
            },
            {
              "status": "affected",
              "version": "2.13 and earlier (MTP 2 series)"
            }
          ]
        },
        {
          "vendor": "Six Apart Ltd.",
          "product": "Movable Type (Cloud Edition)",
          "versions": [
            {
              "status": "affected",
              "version": "9.0.5 (9 series)"
            },
            {
              "status": "affected",
              "version": "8.8.1 (8 series)"
            }
          ]
        },
        {
          "vendor": "Six Apart Ltd.",
          "product": "Movable Type Premium (Cloud Edition)",
          "versions": [
            {
              "status": "affected",
              "version": "9.0.5 (9 series)"
            },
            {
              "status": "affected",
              "version": "2.12 (MTP 2 series)"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-02-04T07:16:01.387",
  "references": [
    {
      "url": "https://jvn.jp/en/jp/JVN45405689/",
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://movabletype.org/news/2026/02/mt-906-released.html",
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://www.sixapart.jp/movabletype/news/2026/02/04-1100.html",
      "source": "vultures@jpcert.or.jp"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "vultures@jpcert.or.jp",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A non-administrative user can upload malicious files. When an administrator or the product accesses that file, an arbitrary script may be executed on the administrator's browser. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well."
    },
    {
      "lang": "es",
      "value": "Un usuario no administrativo puede cargar archivos maliciosos. Cuando un administrador o el producto accede a ese archivo, un script arbitrario puede ejecutarse en el navegador del administrador. Tenga en cuenta que las series Movable Type 7 y 8.4, que están al final de su vida útil (EOL), también se ven afectadas por la vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T10:21:58.577",
  "sourceIdentifier": "vultures@jpcert.or.jp"
}