A code injection vulnerability exists in the upgrade script of Movable Type, which may allow an unauthenticated attacker to execute an arbitrary Perl script or an SQL query on the affected product.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact Low

User Interaction None

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Six Apart Ltd. Movable Type Cloud Edition unaffected
Version Status Constraints
9.2.0 affected ≤ 9.2.1
Six Apart Ltd. Movable Type unaffected
Version Status Constraints
9.0.0 affected ≤ 9.0.9
8.8.0 affected ≤ 8.8.5
8.0.0 affected ≤ 8.0.12
Six Apart Ltd. Movable Type Premium Cloud Edition unaffected
Version Status Constraints
9.2.0 affected ≤ 9.2.1
Six Apart Ltd. Movable Type Premium unaffected
Version Status Constraints
9.0.0 affected ≤ 9.0.9
2.0 affected ≤ 2.17

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://jvn.jp/en/jp/JVN91153973/ cve-icon cve-icon
https://movabletype.org/news/2026/10/mt-930-released.html cve-icon cve-icon
https://www.sixapart.jp/movabletype/news/2026/10/07-1100.html cve-icon cve-icon
History

Wed, 07 Oct 2026 13:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated Code Injection via Upgrade Script in Movable Type

Wed, 07 Oct 2026 10:30:00 +0000

Type Values Removed Values Added
Description A code injection vulnerability exists in the upgrade script of Movable Type, which may allow an unauthenticated attacker to execute an arbitrary Perl script or an SQL query on the affected product.
Weaknesses CWE-94
References
Metrics cvssV3_0

{'score': 9.4, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: jpcert

Published:

Updated: 2026-10-07T17:47:24.024Z

Reserved: 2026-10-02T04:23:48.464Z

Link: CVE-2026-96408

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-07T11:17:20.620

Modified: 2026-10-07T14:47:21.140

Link: CVE-2026-96408

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-07T12:45:16Z

Weaknesses