CVE-2026-23704
Unknown Unknown - Not Provided

Stored XSS via Malicious File Upload in Movable Type Admin Panel

Publication date: 2026-02-04

Last updated on: 2026-02-04

Assigner: JPCERT/CC

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.

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Meta Information

Published
2026-02-04
Last Modified
2026-02-04
Generated
2026-07-06
AI Q&A
2026-02-04
EPSS Evaluated
2026-07-05
NVD
CVE-2026-23704
EUVD
EUVD-2026-5489

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
movable_type movable_type 7
movable_type movable_type 8.4

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

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Executive Summary

This vulnerability allows a non-administrative user to upload malicious files. When an administrator or the product accesses these files, an arbitrary script may be executed on the administrator's browser.

It affects Movable Type 7 series and 8.4 series, including versions that are End-of-Life (EOL).

Impact Analysis

The vulnerability can lead to arbitrary script execution on an administrator's browser, potentially allowing attackers to perform unauthorized actions or gain control over administrative functions.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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