What is the CVSS score of CVE-2026-23704?

CVE-2026-23704 has a CVSS 3.0 base score of 6.5 (Medium). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-23704?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Review file handling controls.

CVE-2026-23704

MEDIUM

Unrestricted Upload of File with Dangerous Type (CWE-434)

2026-02-04 vultures@jpcert.or.jp

File Upload

6.5

CVSS 3.0 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Feb 04, 2026 - 07:16 nvd

MEDIUM 6.5

DescriptionCVE.org

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.

AnalysisAI

Movable Type allows non-administrative users to upload arbitrary files that execute malicious scripts in an administrator's browser when accessed, enabling cross-site scripting attacks with medium impact on confidentiality, integrity, and availability. This vulnerability affects both current and end-of-life versions (7.x and 8.4 series) with no patch currently available. An attacker with basic user privileges can compromise administrator sessions through stored script execution.

Technical ContextAI

Classified as CWE-434 (Unrestricted Upload of File with Dangerous Type). 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.

Affected ProductsAI

A non-administrative user can upload malicious files

RemediationAI

Monitor vendor advisories for a patch. Validate file types by content. Store uploads outside web root. Restrict network access to the affected service where possible.