Improper Neutralization of Formula Elements in a CSV File in Six Apart Ltd products - CVE-2026-24447

Vulnerability identifier: #VU122296

CSH Severity: Medium

CVSS v4: 8.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-24447

CWE-ID: CWE-1236

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper neutralization of formula elements in a CSV file. A remote user can trick a victim to open a specially crafted CSV file and execute arbitrary code on the system.

Movable Type Premium
Movable Type Premium (Advanced Edition)
Movable Type Premium Cloud Edition
Movable Type
Movable Type Advanced
Movable Type Cloud Edition

Install updates from vendor's website.

Movable Type Premium - addressed in versions 2.14, 9.1.0
Movable Type Premium (Advanced Edition) - addressed in versions 2.14, 9.1.0
Movable Type Premium Cloud Edition - addressed in versions 2.14, 9.1.0
Movable Type - addressed in versions 8.0.9, 8.8.2, 9.0.6
Movable Type Advanced - addressed in versions 8.0.9, 8.8.2, 9.0.6
Movable Type Cloud Edition - addressed in versions 8.8.2, 9.1.0

• https://jvn.jp/en/jp/JVN45405689/index.html

• Multiple vulnerabilities in Six Apart Movable Type