CVE-2021-20815: XSS
Cross-site scripting vulnerability in Edit Boilerplate 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.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-20815?
CVE-2021-20815 is a cross-site scripting vulnerability in the Edit Boilerplate screen of Movable Type.
What is the severity of CVE-2021-20815?
The severity of CVE-2021-20815 is medium with a CVSS score of 6.1.
Which software versions are affected by CVE-2021-20815?
CVE-2021-20815 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.
How can I fix CVE-2021-20815?
To fix CVE-2021-20815, upgrade to Movable Type 7.8.0 or Movable Type 6.8.1.
Where can I find more information about CVE-2021-20815?
You can find more information about CVE-2021-20815 at the following references: [JVN website](https://jvn.jp/en/jp/JVN97545738/index.html) and [Movable Type news](https://movabletype.org/news/2021/08/mt-780-681-released.html).