SB2021031315 - Cross-site scripting in Wiki.js
Published: March 13, 2021 Updated: April 28, 2026
Security Bulletin ID
SB2021031315
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Cross-site scripting (CVE-ID: CVE-2021-21383)
The vulnerability allows a remote user to execute arbitrary JavaScript in the browser of another user.
The vulnerability exists due to cross-site scripting in code blocks when rendering wiki page content containing mustache expressions. A remote user can create a crafted wiki page to execute arbitrary JavaScript in the browser of another user.
User interaction is required because the crafted page must be viewed by another user.
Remediation
Install update from vendor's website.