Movable Type plugin A-Form vulnerable to cross-site scripting


Movable Type plugin A-Form provided by ARK-Web co., ltd. contains a cross-site scripting vulnerability (CWE-79).

hibiki moriyama of STNet, Incorporated reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 6.1 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Changed
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

ARK-Web co., ltd
  • A-Form versions prior to 4.1.1 (for Movable Type 7 Series)
  • A-Form versions prior to 3.9.1 (for Movable Type 6 Series)

The developer states that A-Member, A-Reserve, and A-Member Subscription Pack are affected too, because they contain an affected version of A-Form.

An arbitrary script may be executed on the web browser of the user who accessed the site using the product.

[Update the Software]
Update A-Form to the latest version according to the information provided by the developer.
Vendor Information

ARK-Web co., ltd
CWE (What is CWE?)

  1. Cross-site Scripting(CWE-79) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2022-38972

  1. JVN : JVN#48120704
  2. National Vulnerability Database (NVD) : CVE-2022-38972
Revision History

  • [2022/09/09]
      Web page was published
  • [2024/06/13]
      References : Content was added