CVE-2023-28477 : Vulnerability Insights and Analysis

This CVE record pertains to Concrete CMS (previously concrete5) versions 8.5.12 and below, as well as versions 9.0 through 9.1.3. These versions are vulnerable to stored Cross-Site Scripting (XSS) on API Integrations through the name parameter.

Understanding CVE-2023-28477

This section delves into the specifics of CVE-2023-28477, outlining the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2023-28477?

CVE-2023-28477 highlights a stored XSS vulnerability in Concrete CMS versions 8.5.12 and below, and 9.0 through 9.1.3. The flaw specifically affects API Integrations through the name parameter, potentially enabling attackers to inject malicious scripts into webpages viewed by other users.

The Impact of CVE-2023-28477

The impact of this vulnerability is categorized as medium severity. If exploited, it could lead to unauthorized script execution within the context of a user's browser, posing risks of information theft, account compromise, and potential manipulation of web content.

Technical Details of CVE-2023-28477

In this section, we delve deeper into the technical aspects of the CVE, exploring the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability in Concrete CMS versions 8.5.12 and below, and 9.0 through 9.1.3 allows for the storage of malicious scripts in the name parameter of API Integrations. When executed, these scripts can compromise user data and system integrity.

Affected Systems and Versions

All Concrete CMS instances running versions 8.5.12 and below, as well as versions 9.0 through 9.1.3, are susceptible to this stored XSS vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting specially designed requests containing malicious scripts within the name parameter of API Integrations. When processed, these scripts are stored and subsequently executed in the context of other users' interactions with the affected web applications.

Mitigation and Prevention

This section outlines the necessary steps to mitigate the risks posed by CVE-2023-28477 and prevent potential exploitation.

Immediate Steps to Take

Users of affected Concrete CMS versions should update to the latest patched releases promptly.
Implement input validation mechanisms to sanitize user-supplied data and prevent malicious script injection.
Regularly monitor and audit API Integrations for anomalous behavior or unauthorized access attempts.

Long-Term Security Practices

Follow secure coding practices to mitigate the risk of XSS vulnerabilities in web applications.
Conduct regular security assessments and penetration testing to identify and address vulnerabilities proactively.
Educate developers and administrators on secure coding practices and the importance of web application security.

Patching and Updates

Concrete CMS users should apply the patches released by the vendor to address the stored XSS vulnerability in versions 8.5.12 and below, and 9.0 through 9.1.3. Regularly check for security advisories and updates from Concrete CMS to stay informed about emerging threats and patches.