What is CVE-2021-20811?

CVE-2021-20811 is a cross-site scripting vulnerability in the List of Assets screen of Movable Type.

What is the severity of CVE-2021-20811?

CVE-2021-20811 has a severity rating of medium.

How can I fix CVE-2021-20811?

To fix CVE-2021-20811, update your Movable Type software to version 7.8.0 or 6.8.1, depending on your series.

Where can I find more information about CVE-2021-20811?

You can find more information about CVE-2021-20811 on the official Movable Type website or the JPCERT/CC Vulnerability Database.

Vulnerability/
CVE-2021-20811

medium

6.1

CWE

26/8/2021

3/8/2024

CVE-2021-20811: XSS

First published: Thu Aug 26 2021(Updated: )

Cross-site scripting vulnerability in List of Assets screen of Movable Type (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, and Movable Type Premium Advanced 1.44 and earlier) allows remote attackers to inject arbitrary script or HTML via unspecified vectors.

Credit: vultures@jpcert.or.jp

Affected Software	Affected Version	How to fix
Sixapart Movable Type	<=1.44
Sixapart Movable Type	<=1.44
Sixapart Movable Type	>=6.0<=6.8.0
Sixapart Movable Type	>=7.0<7.8.0
Sixapart Movable Type	>=7.0<7.8.0

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Reference Links

Frequently Asked Questions

What is CVE-2021-20811?
CVE-2021-20811 is a cross-site scripting vulnerability in the List of Assets screen of Movable Type.
What software versions are affected by CVE-2021-20811?
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.
What is the severity of CVE-2021-20811?
CVE-2021-20811 has a severity rating of medium.
How can I fix CVE-2021-20811?
To fix CVE-2021-20811, update your Movable Type software to version 7.8.0 or 6.8.1, depending on your series.
Where can I find more information about CVE-2021-20811?
You can find more information about CVE-2021-20811 on the official Movable Type website or the JPCERT/CC Vulnerability Database.

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agent/softwarecombine
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collector/mitre-cve
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vendor/sixapart
canonical/sixapart movable type
version/sixapart movable type/1.44
version/sixapart movable type/6.0
version/sixapart movable type/6.8.0
version/sixapart movable type/7.0

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