CVE-2023-6911: WSO2 Registry Stored Cross Site Scripting (XSS) vulnerability

Background

The WSO2 Registry is a package that provides a feature-rich registry for managing and storing various types of assets. It is commonly used in enterprise environments to facilitate the storage and retrieval of artifacts such as web services, APIs, and configurations. The Registry is a critical component of the WSO2 Carbon platform, which is widely adopted for building and deploying enterprise applications. However, a vulnerability has been discovered in the Registry that allows for Stored Cross Site Scripting (XSS) attacks.

Vulnerability Detail

The vulnerability arises from improper output encoding in the Registry feature of the WSO2 Management Console. This allows an attacker to inject malicious payloads into the Registry, which can then be executed when accessed by other users. The impact of this vulnerability can be significant, as it enables an attacker to execute arbitrary JavaScript code in the context of other users, potentially leading to session hijacking, data theft, or other malicious activities. The vulnerability has been assigned a CVSS score of 4.8, indicating a moderate severity level.

Workaround

If upgrading to the latest version is not immediately feasible, a temporary workaround can be implemented to mitigate the risk. This involves implementing input validation and output encoding measures within the application code that interacts with the Registry. By properly sanitizing user input and encoding output, the risk of XSS attacks can be significantly reduced. Here is an example of how input validation and output encoding can be implemented in Java:

// Input validation
String userInput = request.getParameter("input");
if (userInput != null) {
    userInput = userInput.replaceAll("<", "&lt;").replaceAll(">", "&gt;");
}

// Output encoding
String output = "<script>alert('XSS')</script>";
output = output.replaceAll("<", "&lt;").replaceAll(">", "&gt;");
response.getWriter().write(output);

Conclusion

The WSO2 Registry is vulnerable to a Stored Cross Site Scripting (XSS) attack due to improper output encoding. This can be mitigated by upgrading to version 4.7.37 or later, or by implementing input validation and output encoding measures. For further assistance and support in addressing this vulnerability, please contact DevNack.com.

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