CVE-2017-15682: Cross Site Scripting in Crafter CMS

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Background

Crafter CMS is an open-source content management system that provides a platform for creating, managing, and delivering digital content. It includes a web-based admin panel called Crafter Studio, which allows users to manage their content and website. The vulnerability identified as CVE-2017-15682 affects Crafter Studio version 3.0.1. This version allows unauthenticated attackers to inject malicious JavaScript code, leading to a stored/blind cross-site scripting (XSS) vulnerability in the admin panel.

Vulnerability Detail

The vulnerability in Crafter CMS Crafter Studio 3.0.1 enables an attacker without authentication to inject malicious JavaScript code. This code can be stored and executed within the admin panel, potentially compromising the security and integrity of the system. Cross-site scripting attacks can lead to various consequences, including unauthorized access, data theft, and manipulation of user sessions. The vulnerability has been assigned a severity level of MODERATE according to the Common Vulnerability Scoring System (CVSS) and is classified under CWE-79.

Workaround

As a temporary workaround, users can implement input validation and output encoding to mitigate the risk of XSS attacks. This involves validating and sanitizing user input to remove any potentially malicious code and encoding output to prevent the execution of injected scripts. Here is an example of input validation and output encoding in Java using the OWASP Java Encoder library:

import org.owasp.encoder.Encode;

public class XSSUtils {
  public static String sanitizeInput(String input) {
    // Perform input validation and sanitization
    // Example: remove any script tags
    return input.replaceAll("<script>", "");
  }

  public static String encodeOutput(String output) {
    // Perform output encoding
    return Encode.forHtml(output);
  }
}

Conclusion

The vulnerability CVE-2017-15682 in Crafter CMS Crafter Studio 3.0.1 allows unauthenticated attackers to inject malicious JavaScript code, leading to a stored/blind XSS vulnerability in the admin panel. It is crucial to upgrade to a fixed version of Crafter CMS, such as version 3.0.1, to address this vulnerability. Regularly checking for updates and promptly applying them is essential for maintaining the security of the system. For further support on vulnerability remediation, please contact DevNack.com.

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