CVE-2021-27673 : Security Advisory and Response

A Cross Site Scripting (XSS) vulnerability in the "admin_boxes.ajax.php" component of Tribal Systems Zenario CMS v8.8.52729 allows remote attackers to execute arbitrary code by injecting arbitrary HTML into the "cID" parameter when creating a new HTML component.

Understanding CVE-2021-27673

This CVE discloses a critical XSS vulnerability in Zenario CMS, version 8.8.52729, which can be exploited by malicious actors to run unauthorized code remotely.

What is CVE-2021-27673?

CVE-2021-27673 is a Cross Site Scripting (XSS) flaw in Tribal Systems Zenario CMS v8.8.52729, enabling attackers to execute malicious scripts by injecting HTML into the "cID" parameter.

The Impact of CVE-2021-27673

The impact of this vulnerability is severe as it allows remote threat actors to execute arbitrary code, potentially compromising the integrity and security of the affected system.

Technical Details of CVE-2021-27673

This section provides more insight into the vulnerability, affected systems, versions, and exploitation mechanisms.

Vulnerability Description

The flaw lies in the inadequate input validation of the "cID" parameter in the "admin_boxes.ajax.php" component, giving attackers the ability to inject malicious HTML code.

Affected Systems and Versions

Tribal Systems Zenario CMS v8.8.52729 is confirmed to be affected by this vulnerability. Other versions may also be at risk if they exhibit similar code logic.

Exploitation Mechanism

Remote threat actors inject arbitrary HTML code into the "cID" parameter when creating an HTML component, leading to the execution of unauthorized scripts.

Mitigation and Prevention

To address CVE-2021-27673, immediate and long-term security measures should be implemented to protect systems from potential exploitation.

Immediate Steps to Take

Update Zenario CMS to the latest version to mitigate the vulnerability.
Implement strict input validation to sanitize user inputs and prevent XSS attacks.

Long-Term Security Practices

Regular security assessments and code reviews to identify and address vulnerabilities promptly.
Educate developers and administrators on secure coding practices and the risks of XSS vulnerabilities.

Patching and Updates

Stay informed about security updates for Zenario CMS and apply patches promptly to ensure the system's security.