What is the severity of CVE-2021-20665?

CVE-2021-20665 has a medium severity rating due to its potential to allow cross-site scripting attacks in affected versions of Movable Type.

How do I fix CVE-2021-20665?

To mitigate CVE-2021-20665, update your Movable Type to version 7.4706 or later or Movable Type Premium to version 1.40 or later.

Which versions of Movable Type are affected by CVE-2021-20665?

CVE-2021-20665 affects Movable Type versions up to and including 7.4705 and Movable Type Premium versions up to and including 1.39.

Can I continue using my current Movable Type version with CVE-2021-20665?

Using an affected version with CVE-2021-20665 poses a risk, so it is strongly recommended to upgrade to a fixed version.

What type of vulnerability is CVE-2021-20665?

CVE-2021-20665 is classified as a cross-site scripting (XSS) vulnerability that can allow attackers to inject malicious scripts.

Vulnerability/
CVE-2021-20665

medium

6.1

CWE

5/3/2021

3/8/2024

CVE-2021-20665: XSS

First published: Fri Mar 05 2021(Updated: )

Cross-site scripting vulnerability in in Add asset screen of Contents field of 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, and Movable Type Premium Advanced 1.39 and earlier allows remote attackers to inject an arbitrary script via unspecified vectors.

Credit: vultures@jpcert.or.jp

Affected Software	Affected Version	How to fix
Six Apart Movable Type	<=7.4705
Movable Type	<=7.4705
Movable Type	<=1.39
Movable Type	<=1.39

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-20665?
CVE-2021-20665 has a medium severity rating due to its potential to allow cross-site scripting attacks in affected versions of Movable Type.
How do I fix CVE-2021-20665?
To mitigate CVE-2021-20665, update your Movable Type to version 7.4706 or later or Movable Type Premium to version 1.40 or later.
Which versions of Movable Type are affected by CVE-2021-20665?
CVE-2021-20665 affects Movable Type versions up to and including 7.4705 and Movable Type Premium versions up to and including 1.39.
Can I continue using my current Movable Type version with CVE-2021-20665?
Using an affected version with CVE-2021-20665 poses a risk, so it is strongly recommended to upgrade to a fixed version.
What type of vulnerability is CVE-2021-20665?
CVE-2021-20665 is classified as a cross-site scripting (XSS) vulnerability that can allow attackers to inject malicious scripts.

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agent/softwarecombine
collector/nvd-index
agent/software-canonical-lookup-request
vendor/movabletype
canonical/six apart movable type
version/six apart movable type/7.4705
canonical/movable type
version/movable type/7.4705
version/movable type/1.39

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