Cross-site Scripting in Movable Type Makes It Vulnerable to Attacks
CVE-2021-20813

6.1MEDIUM

Key Information:

Vendor: Six Apart Ltd.
Status: Movable Type
Vendor: CVE Published:; 26 August 2021

🔔 Create Six Apart Ltd. Vulnerability Alert

What is CVE-2021-20813?

A cross-site scripting vulnerability exists in the Edit screen of Content Data within Movable Type and Movable Type Advanced. This flaw allows remote attackers to inject arbitrary scripts or HTML into the affected platforms through unspecified vectors, potentially compromising user data and application integrity. Users of versions before 7 r.4903 are advised to update their systems to mitigate the risk associated with this vulnerability.

Affected Version(s)

Movable Type Movable Type 7 r.4903 and earlier (Movable Type 7 Series) and Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series)