🛡️ CVE-2026-23704

🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-434 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability low.

Weakness class

CVE-2026-23704 is classified as CWE-434: Unrestricted Upload of File with Dangerous Type. Uploads are accepted without restricting type, so an executable file can be placed where the server will run it.

Affected software

CVE-2026-23704 is recorded against 1 package.

  • unknown

Timeline and source

Published on 4 February 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

jvn.jp
movabletype.org
www.sixapart.jp

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
CWE CWE-434
Public Exploit ✅ No
Source NVD
Published 2026-02-04
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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