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Movable Type CVE-2022-38078

CRITICAL
Code Injection (CWE-94)
2022-08-24 vultures@jpcert.or.jp
9.8
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Code injection prevention, sandbox exec
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

A remote attacker could inject and execute arbitrary code within the application by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 1.9% exploitation probability (EPSS)

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AnalysisAI

Movable Type XMLRPC API provided by Six Apart Ltd. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Never evaluate user-controlled input as code. Use sandboxing, disable dangerous functions, apply strict input validation.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Code Injection (CWE-94), which allows attackers to inject and execute arbitrary code within the application. Movable Type XMLRPC API provided by Six Apart Ltd. contains a command injection vulnerability. Sending a specially crafted message by POST method to Movable Type XMLRPC API may allow arbitrary Perl script execution, and an arbitrary OS command may be executed through it. Affected products and versions are as follows: Movable Type 7 r.5202 and earlier, Movable Type Advanced 7 r.5202 and earlier, Movable Type 6.8.6 and earlier, Movable Type Advanced 6.8.6 and earlier, Movable Type Premium 1.52 and earlier, and Movable Type Premium Advanced 1.52 and earlier. Note that all versions of Movable Type 4.0 or later including unsupported (End-of-Life, EOL) versions are also affected by this vulnerability. Affected products include: Sixapart Movable Type.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

Movable Type XMLRPC API provided by Six Apart Ltd. contains a command injection vulnerability. Sending a specially crafted message by POST method to Movable Type XMLRPC API may allow arbitrary Perl script execution, and an arbitrary OS command may be executed through it. Affected products and versions are as follows: Movable Type 7 r.5202 and earlier, Movable Type Advanced 7 r.5202 and earlier, Movable Type 6.8.6 and earlier, Movable Type Advanced 6.8.6 and earlier, Movable Type Premium 1.52 and earlier, and Movable Type Premium Advanced 1.52 and earlier. Note that all versions of Movable Type 4.0 or later including unsupported (End-of-Life, EOL) versions are also affected by this vulnerability.

Threat Intelligence Overview

EPSS Score
1.9%
Top 23% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 1.9%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

51
Low Medium High Critical
KEV: 0
EPSS: +2
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

Code Injection CRITICAL

Code injection occurs when an application accepts user input and passes it directly into a language interpreter or evaluator without proper sanitization.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:a:sixapart:movable_type:*:*:*:*:premium:*:*:*
cpe:2.3:a:sixapart:movable_type:*:*:*:*:premium_advanced:*:*:*
cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:-:*:*
cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:aws:*:*
cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:-:*:*
cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:aws:*:*
cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:-:*:*
cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:aws:*:*
cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:-:*:*
cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:aws:*:*
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Cross-site request forgery (CSRF) vulnerability in Movable Type series (Movable Type 7 r.4606 (7.2.1) and earlier (Movab

CVE-2013-2184 HIGH
7.5 Mar 27

Movable Type before 5.2.6 does not properly use the Storable::thaw function, which allows remote attackers to execute ar

CVE-2012-0320 HIGH
7.5 Mar 03

Movable Type before 4.38, 5.0x before 5.07, and 5.1x before 5.13 allows remote attackers to take control of sessions via

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