Published:2021/08/25  Last Updated:2021/08/25

JVN#97545738
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-2021-20808, CVE-2021-20809, CVE-2021-20810, CVE-2021-20811, CVE-2021-20815

  • Movable Type 7 r.4903 and earlier (Movable Type 7 Series)
  • Movable Type 6.8.0 and earlier (Movable Type 6 Series)
  • Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series)
  • Movable Type Premium 1.44 and earlier
  • Movable Type Premium Advanced 1.44 and earlier
CVE-2021-20812
  • Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series)
  • Movable Type Premium Advanced 1.44 and earlier
CVE-2021-20813
  • Movable Type 7 r.4903 and earlier (Movable Type 7 Series)
  • Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series)
CVE-2021-20814
  • Movable Type 7 r.4903 and earlier (Movable Type 7 Series)
  • Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series)
  • Movable Type Premium 1.44 and earlier

Description

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

  • Cross-site scripting vulnerability in Search screen (CWE-79) - CVE-2021-20808
    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 Create screens of Entry, Page, and Content Type (CWE-79) - CVE-2021-20809
    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 Website Management screen (CWE-79) - CVE-2021-20810
    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 List of Assets screen (CWE-79) - CVE-2021-20811
    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 Setting screen of Server Sync (CWE-79) - CVE-2021-20812
    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 Edit screen of Content Data (CWE-79) - CVE-2021-20813
    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 Setting screen of ContentType Information Widget Plugin (CWE-79) - CVE-2021-20814
    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 Edit Boilerplate screen (CWE-79) - CVE-2021-20815
    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 the software to the latest version according to the information provided by the developer.

Vendor Status

Vendor Status Last Update Vendor Notes
Six Apart Ltd. Vulnerable 2021/08/25 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 the solutions 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-2021-20808
CVE-2021-20809
CVE-2021-20810
CVE-2021-20811
CVE-2021-20812
CVE-2021-20813
CVE-2021-20814
CVE-2021-20815
JVN iPedia JVNDB-2021-000079