Movable Type access restriction bypass vulnerability


Movable Type contains an access restriction bypass vulnerability.

Movable Type, a web log system from Six Apart KK, contains a vulnerability that allows a remote attacker to bypass access restrictions.

A successful attack requires mt-wizard.cgi not to be deleted after initial setup. For more information, refer to the developer's website.

Masashi Shiraishi reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V2 Severity:
Base Metrics 5.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

Six Apart, Ltd.
  • Movable Type 4.25 (includes Professional and Community Packs) and earlier
  • Movable Type (commercial) 4.25 (includes Professional Pack) and earlier
  • Movable Type (enterprise) 4.25 and earlier
  • Movable Type 4.25 (Open Source) and earlier


A remote attacker may send unsolicited email to arbitrary addresses or view information stored in Movable Type.

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

Six Apart, Ltd.
CWE (What is CWE?)

  1. Permissions(CWE-264) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2009-2481

  1. JVN : JVN#08369659
  2. National Vulnerability Database (NVD) : CVE-2009-2481
  3. Secunia Advisory : SA35534
  4. SecurityFocus : 35471
  5. ISS X-Force Database : 51330
  6. VUPEN Security : VUPEN/ADV-2009-1668
Revision History

  • [2009/07/01]
      Web page published