Six Apart Movable Type 8.4 csv injection

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Six Apart Movable Type, Movable Type Advanced and Movable Type Premium 8.4. This impacts an unknown function. Executing a manipulation can lead to csv injection. This vulnerability only affects products that are no longer supported by the maintainer. The identification of this vulnerability is CVE-2026-24447. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Six Apart Movable Type, Movable Type Advanced and Movable Type Premium 8.4 and classified as critical. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a csv injection vulnerability. The CWE definition for the vulnerability is CWE-1236. The product saves user-provided information into a Comma-Separated Value (CSV) file, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as a command when the file is opened by a spreadsheet product. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

If a malformed data is input to the affected product, a CSV file downloaded from the affected product may contain such malformed data. When a victim user download and open such a CSV file, the embedded code may be executed in the user's environment. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well.

The advisory is available at movabletype.org. This vulnerability was named CVE-2026-24447 since 01/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/04/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

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Version

License

Support

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (jpcert): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Csv injection
CWE: CWE-1236 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/29/2026 CVE reserved
02/04/2026 +6 days Advisory disclosed
02/04/2026 +0 days VulDB entry created
02/04/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: movabletype.org
Status: Confirmed

CVE: CVE-2026-24447 (🔒)
GCVE (CVE): GCVE-0-2026-24447
GCVE (VulDB): GCVE-100-344254

Entryinfo

Created: 02/04/2026 09:20
Changes: 02/04/2026 09:20 (73)
Complete: 🔍
Cache ID: 216::103

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