CVE-2021-42118 : Security Advisory and Response

A detailed description of CVE-2021-42118 focusing on a Persistent Cross Site Scripting vulnerability in Business-DNA Solutions GmbH's TopEase platform version <= 7.1.27.

Understanding CVE-2021-42118

This CVE entry highlights a critical Stored XSS vulnerability in the TopEase platform that poses a significant security risk.

What is CVE-2021-42118?

The CVE-2021-42118 vulnerability involves Persistent Cross Site Scripting in Web Applications on the TopEase platform, allowing attackers to inject malicious code to compromise user data and accounts.

The Impact of CVE-2021-42118

The exploitation of this vulnerability enables attackers to execute arbitrary HTML and JavaScript code, facilitating account takeover and compromising user data confidentiality and integrity.

Technical Details of CVE-2021-42118

Key technical insights into the CVE-2021-42118 vulnerability.

Vulnerability Description

Type: Stored XSS
Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
CVSS v3.1 Base Score: 8.1 (High)

Affected Systems and Versions

Product: TopEase
Vendor: Business-DNA Solutions GmbH
Version: <= 7.1.27 (Custom)

Exploitation Mechanism

Attackers with Object Modification privileges can inject malicious code into object attributes on the TopEase platform, bypassing security measures to steal sensitive information.

Mitigation and Prevention

Recommendations to mitigate the CVE-2021-42118 vulnerability.

Immediate Steps to Take

Upgrade TopEase to version > 7.1.27 to eliminate the vulnerability.
Implement strict input validation and output encoding to prevent XSS attacks.
Monitor and audit user activities to detect unauthorized access.

Long-Term Security Practices

Conduct regular security assessments and penetration testing.
Provide security awareness training to employees on recognizing and mitigating XSS vulnerabilities.
Stay informed about security updates and patches for the TopEase platform.

Patching and Updates

Business-DNA Solutions GmbH should release patches promptly to address the CVE-2021-42118 vulnerability and communicate update instructions to affected users.