CVE-2021-32621 Explained : Impact and Mitigation

A Script injection vulnerability in XWiki Platform versions prior to 12.6.7 and 12.10.3 allows a user without Script or Programming rights to execute scripts by editing gadget titles in the dashboard. This CVE has a CVSS base score of 8.8, indicating a high severity.

Understanding CVE-2021-32621

XWiki Platform is a generic wiki platform that provides runtime services for applications. The vulnerability allows unauthorized script execution via gadget titles editing.

What is CVE-2021-32621?

CVE-2021-32621 is a script injection vulnerability in XWiki Platform versions prior to 12.6.7 and 12.10.3, enabling users without Script or Programming rights to execute scripts by manipulating gadget titles.

The Impact of CVE-2021-32621

The vulnerability has a base severity level rated as HIGH, with a CVSS base score of 8.8. It poses a risk of unauthorized script execution with high confidentiality, integrity, and availability impact.

Technical Details of CVE-2021-32621

The vulnerability is categorized as CWE-94: Improper Control of Generation of Code ('Code Injection'). It has a CVSS v3.1 base score of 8.8, with low attack complexity and privileges required, making it exploitable over the network.

Vulnerability Description

Users without Script or Programming rights can exploit the vulnerability by editing gadget titles to execute unauthorized scripts on the platform.

Affected Systems and Versions

XWiki Platform versions prior to 12.6.7 and 12.10.3 are affected by this vulnerability.

Exploitation Mechanism

The vulnerability can be exploited by users manipulating gadget titles in the dashboard to execute scripts without the necessary permissions.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-32621, immediate steps such as updating to patched versions and applying security best practices are crucial.

Immediate Steps to Take

Update XWiki Platform to version 12.6.7, 12.10.3, or newer to address this vulnerability.
Restrict access to dashboard editing to users with Script or Programming rights.

Long-Term Security Practices

Regularly monitor and install software updates and patches for XWiki Platform.
Educate users on secure coding practices and the risks of unauthorized script execution.

Patching and Updates

Ensure timely application of security patches and updates to XWiki Platform to prevent exploitation of this vulnerability.