Hello everyone!

In this post, we will discuss the newly found CVE-2023-43873 vulnerability that exists in the e017 CMS v2.3.2. The vulnerability is a Cross-Site Scripting (XSS) issue, which can allow a local attacker to execute arbitrary code through the Name field in the e017 CMS Manage Menu. We'll delve into the technical details, take a look at the code fragments, link the original references, and explore the possible exploit details. Please feel free to share your thoughts on this in the comments below.

💻 Vulnerability Explanation

e017 CMS (CVE-2023-43873) is a popular content management system that is extensively used for designing web applications. Version 2.3.2 has been discovered to have a Cross-Site Scripting (XSS) vulnerability, allowing an attacker to execute arbitrary code in the context of a victim's user session by injecting a crafted script into the Name field of the Manage Menu.

This vulnerability exists because e017 CMS does not properly sanitize user input within the "Name" field which allows an attacker to use a scripting language of their choice to gain unauthorized access, potentially compromising sensitive user data.

🧑‍💻 Code Snippet

To demonstrate how this vulnerability can be exploited, let's look at a simple JavaScript code snippet that shows the injection of the crafted script into the Name field in the Manage Menu.

<script>
// Begin malicious code injection.
var injectedScript = "<script>alert('XSS Attack');</script>";
// Select the Name input field within the Manage Menu.
document.getElementById("NameField").value = injectedScript;
// Submit the form containing the injected code.
document.getElementById("FormToSubmit").submit();
</script>

This simple JavaScript script injects an alert that will execute on any browser that views the affected page in e017 CMS. Once the code is injected and the form is submitted, unsuspecting users will be prompted with the "XSS Attack" alert when they navigate to the compromised page.

🌐 Original References

The original documentation of this vulnerability can be found on the MITRE CVE website with the following links:
- CVE Details
- National Vulnerability Database (NVD)

🛡️ Exploit Details

To exploit this vulnerability, an attacker must first gain access to the e017 CMS v2.3.2 system. They will then need to navigate to the Manage Menu and inject their malicious code into the Name field. Once the code is injected, the attacker must submit the form to save the changes. The malicious code will execute on any browser that views the affected page, potentially allowing the attacker to steal sensitive information or perform unauthorized actions within the user's session.

To prevent this exploit, administrators of e017 CMS v2.3.2 can follow these steps

1. Ensure proper input validation and sanitization: Implementing strong input validation and sanitization routines will help prevent XSS attacks by removing potentially harmful script codes before they can be stored and executed.
2. Update to a secure version of e017 CMS: Keep an eye out for future updates that may fix this vulnerability or consider switching to a content management system with a more robust security system.
3. Regularly monitor the system for abnormal behavior: Regularly monitoring the system can help administrators detect unauthorized access and take appropriate actions to secure the system.

Conclusion

We have highlighted the CVE-2023-43873 vulnerability, which exposes a Cross-Site Scripting (XSS) issue in e017 CMS v2.3.2. We examined the code snippet, linked to original references, and detailed the possible exploit scenario. By understanding and addressing this vulnerability, users can ensure robust security and prevent unauthorized access to their e017 CMS system.

Timeline

Published on: 09/28/2023 14:15:25 UTC
Last modified on: 09/29/2023 19:09:45 UTC