What is CVE-2021-20810?

CVE-2021-20810 is a cross-site scripting vulnerability in the Website Management screen of Movable Type.

What is the severity of CVE-2021-20810?

CVE-2021-20810 has a severity rating of 6.1 (medium).

How can I fix CVE-2021-20810?

To fix CVE-2021-20810, you should update Movable Type to version 7.8.0 or later, 6.8.1 or later, or apply the appropriate patches provided by the vendor.

Where can I find more information about CVE-2021-20810?

You can find more information about CVE-2021-20810 at the following references: [Link 1](https://jvn.jp/en/jp/JVN97545738/index.html) and [Link 2](https://movabletype.org/news/2021/08/mt-780-681-released.html).

Vulnerability/
CVE-2021-20810

medium

6.1

CWE

26/8/2021

3/8/2024

CVE-2021-20810: XSS

Q: Which versions of Movable Type are affected by CVE-2021-20810?

CVE-2021-20810 affects 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), and Movable Type Premium 1.44 and earlier.

First published: Thu Aug 26 2021(Updated: )

Cross-site scripting vulnerability in Website Management 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

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is CVE-2021-20810?
CVE-2021-20810 is a cross-site scripting vulnerability in the Website Management screen of Movable Type.
Which versions of Movable Type are affected by CVE-2021-20810?
CVE-2021-20810 affects 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), and Movable Type Premium 1.44 and earlier.
What is the severity of CVE-2021-20810?
CVE-2021-20810 has a severity rating of 6.1 (medium).
How can I fix CVE-2021-20810?
To fix CVE-2021-20810, you should update Movable Type to version 7.8.0 or later, 6.8.1 or later, or apply the appropriate patches provided by the vendor.
Where can I find more information about CVE-2021-20810?
You can find more information about CVE-2021-20810 at the following references: [Link 1](https://jvn.jp/en/jp/JVN97545738/index.html) and [Link 2](https://movabletype.org/news/2021/08/mt-780-681-released.html).

collector/nvd-index
agent/references
agent/author
agent/severity
agent/weakness
agent/tags
agent/type
agent/event
agent/description
agent/last-modified-date
agent/softwarecombine
agent/first-publish-date
collector/mitre-cve
source/MITRE
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

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.