Code Injection in Six Apart Ltd products - CVE-2026-25776

Vulnerability identifier: #VU125192

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-25776

CWE-ID: CWE-94

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 input validation in the filtering process of the Listing Framework. A remote attacker can send a specially crafted Perl script and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Movable Type Premium (MT8-based)
Movable Type Premium
Movable Type Premium (Advanced Edition)
Movable Type
Movable Type Advanced

Install updates from vendor's website.

Movable Type Premium (MT8-based) - addressed in versions 2.15, 9.0.7, 9.1.1
Movable Type Premium - addressed in versions 2.15, 9.0.7, 9.1.1
Movable Type Premium (Advanced Edition) - addressed in versions 2.15, 9.0.7, 9.1.1
Movable Type - addressed in versions 8.0.10, 8.8.3, 9.0.7, 9.1.1
Movable Type Advanced - addressed in versions 8.0.10, 8.8.3, 9.0.7, 9.1.1

• https://jvn.jp/en/jp/JVN66473735/index.html
• https://movabletype.org/news/2026/04/mt-907-released.html

• Multiple vulnerabilities in Six Apart Movable Type