Published:2011/05/25  Last Updated:2011/05/25

Movable Type vulnerable to cross-site scripting


Movable Type contains a cross-site scripting vulnerability.

Products Affected

  • Movable Type 4.21 and earlier
  • Movable Type Enterprise 4.21 and earlier
  • Movable Type Community Solution 4.21 and earlier
  • Movable Type Open Source 4.21 and earlier


Movable Type, a web log system from Six Apart KK, contains a cross-site scripting vulnerability due to an issue in the management screen.

This vulnerability is different than the previous vulnerabilities disclosed on JVN.


An arbitrary script may be executed on the user's web browser.


Update the Software
Update to the latest version according to the information provided by the developer.

Vendor Status

Vendor Status Last Update Vendor Notes
Six Apart KK vulnerable 2011/05/25


JPCERT/CC Addendum

This JVN publication was delayed to 2011/5/25 after developer fixes were developed. From the fiscal year 2011, JPCERT/CC is using a new vendor coordination procedure. This new procedure came from the recommendation of the fiscal year 2010 "Study Group on Information System Vulnerability Handling" aimed at more timely JVN publications.

Vulnerability Analysis by JPCERT/CC

Analyzed on 2011.05.25

Measures Conditions Severity
Access Required can be attacked over the Internet using packets
  • High
Authentication anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required the user must be convinced to take a standard action that does not feel harmful to most users, such as click on a link or view a file
  • Mid
Exploit Complexity the user must be convinced to take a difficult or suspicious action. If the honest user must have elevated privileges, they are likely to be more suspiciouse
  • High

Description of each analysis measures


Takeshi Terada of Mitsui Bussan Secure Directions reported this vulnerability to IPA.
JPCERT/CC coordinated with the vendor under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2008-5845
JVN iPedia JVNDB-2011-000031