Cross-site Scripting (XSS) is a security vulnerability that allows an attacker to inject malicious scripts into webpages viewed by others. It occurs when an application includes user input in its output without proper sanitization or validation. In this post, we will discuss the CVE-2024-53794 vulnerability found in LOOS, Inc. Arkhe Blocks from N/A to version 2.27., which allows stored XSS attacks. This issue has been marked as Improper Neutralization of Input During Web Page Generation.
CVE ID: CVE-2024-53794
Affected Versions: LOOS, Inc. Arkhe Blocks from N/A to 2.27.
Vulnerability Type: Stored Cross-site Scripting (XSS)
Original References
1. https://www.example1.com/CVE-2024-53794/
2. https://www.example2.com/loos-arkhe-blocks-stored-xss/
The vulnerability exists within the Arkhe Blocks plugin, which is a set of custom blocks for the WordPress Gutenberg Editor. Attackers can inject malicious JavaScript code into the website without proper neutralization, leading to stored XSS attacks. This can potentially compromise the security and privacy of website visitors and administrators.
Proof of Concept
To exploit this vulnerability, an attacker can send crafted input containing a JavaScript payload through a vulnerable Arkhe Blocks instance. This input then gets improperly neutralized and stored in the CMS. When other users visit the affected webpage, the malicious script executes in their browser.
Here's a sample code snippet demonstrating this vulnerability
<!-- Attacker injects the following malicious input -->
<script>alert('XSS');</script>
<!-- End of attacker input -->
<div class="arkhe-blocks">
...
<!-- The malicious payload gets improperly neutralized and stored -->
<div class="arkhe-blocks-container">
<script>alert('XSS');</script>
</div>
...
</div>
When this infected webpage is viewed by other users, the JavaScript payload executes, causing an alert box with the message "XSS" to pop up. This simple PoC demonstrates the potential risks of this stored XSS vulnerability.
Mitigation
In order to mitigate this vulnerability, update your Arkhe Blocks plugin to version 2.27.1 or newer. This will incorporate necessary patches to address the stored XSS vulnerability.
Find the 'Arkhe Blocks' plugin in the list, and click on 'Update Now.'
If you are using an affected version today, it is crucial to update your plugin immediately to protect your website from potential attacks.
Conclusion
The CVE-2024-53794 vulnerability in LOOS, Inc. Arkhe Blocks showcases the importance of proper input validation and sanitization in web applications. Web developers must ensure that user-generated content is adequately neutralized before output to prevent XSS attacks. Users and administrators should always keep their software updated with the latest security patches to protect against such vulnerabilities.
Timeline
Published on: 12/06/2024 14:15:21 UTC