Vulnerability identifier: #VU66754

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-38078

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Movable Type
Web applications / CMS
Movable Type Premium
Web applications / CMS
Movable Type Advanced
Web applications / CMS
Movable Type Premium Advanced
Web applications / CMS

Vendor: Six Apart Ltd

Description

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

The vulnerability exists due to improper input validation in the Movable Type XMLRPC API. A remote unauthenticated attacker can send a specially crafted message and execute arbitrary OS commands on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Movable Type: 6.8.0 - r.5202

Movable Type Premium: 1.52

Movable Type Advanced: 6.8.1 - r.5202

Movable Type Premium Advanced: 1.52

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External links
http://movabletype.org/news/2022/08/mt-795-687-released.html
http://jvn.jp/en/jp/JVN57728859/index.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.