Published:2021/02/24  Last Updated:2021/02/24

JVN#66542874
Multiple cross-site scripting vulnerabilities in Movable Type

Overview

Movable Type provided by Six Apart Ltd. contains multiple cross-site scripting vulnerabilities.

Products Affected

CVE-2021-20663, CVE-2021-20664

  • Movable Type 7 r.4705 and earlier (Movable Type 7 Series)
  • Movable Type Advanced 7 r.4705 and earlier (Movable Type Advanced 7 Series)
  • Movable Type 6.7.5 and earlier (Movable Type 6.7 Series)
  • Movable Type Premium 1.39 and earlier
  • Movable Type Premium Advanced 1.39 and earlier
CVE-2021-20665
  • Movable Type 7 r.4705 and earlier (Movable Type 7 Series)
  • Movable Type Advanced 7 r.4705 and earlier (Movable Type Advanced 7 Series)
  • Movable Type Premium 1.39 and earlier
  • Movable Type Premium Advanced 1.39 and earlier

Description

Movable Type provided by Six Apart Ltd. contains multiple cross-site scripting vulnerabilities listed below.

  • Cross-site scripting vulnerability in Role authority setting screen (CWE-79) - CVE-2021-20663
    CVSS v3 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Base Score: 6.1
    CVSS v2 AV:N/AC:H/Au:N/C:N/I:P/A:N Base Score: 2.6
  • Cross-site scripting vulnerability in Asset registration screen (CWE-79) - CVE-2021-20664
    CVSS v3 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Base Score: 6.1
    CVSS v2 AV:N/AC:H/Au:N/C:N/I:P/A:N Base Score: 2.6
  • Cross-site scripting vulnerability in Add asset screen of Contents field (CWE-79) - CVE-2021-20665
    CVSS v3 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Base Score: 6.1
    CVSS v2 AV:N/AC:H/Au:N/C:N/I:P/A:N Base Score: 2.6

Impact

An arbitrary script may be executed on a logged-in user's web browser.

Solution

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 Ltd. Vulnerable 2021/02/24 Six Apart Ltd. website

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Credit

Six Apart Ltd. reported these vulnerabilities to JPCERT/CC to notify users of its solution through JVN. JPCERT/CC and Six Apart Ltd. coordinated under the Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2021-20663
CVE-2021-20664
CVE-2021-20665
JVN iPedia JVNDB-2021-000017