CVE-2024-26490 - Exploiting the Cross-Site Scripting Vulnerability in Flusity-CMS v2.33's Addon JD Simple Module

Security researchers have discovered a cross-site scripting (XSS) vulnerability in the Addon JD Simple module of the popular content management system (CMS) called "Flusity-CMS" version 2.33. This vulnerability allows potential attackers to execute arbitrary web scripts or HTML code by injecting malicious payloads into the Title text field. In this post, we will explore this vulnerability, known as CVE-2024-26490, in detail, providing insight into how it works and how cybercriminals might exploit it to attack vulnerable systems.

Vulnerability Details

Exploiting this particular XSS vulnerability involves an attacker injecting a crafted payload into the Title text field of the Addon JD Simple module in Flusity-CMS v2.33. The flaw has its roots in the lack of proper filtration and sanitization of user-supplied input data, allowing an attacker to execute arbitrary web scripts and HTML code.

The following code snippet demonstrates a simple example of an injected payload that triggers the XSS vulnerability:

<script>alert('XSS Vulnerability Found!');</script>

This injected payload, when processed and rendered by a victim's browser, would result in the display of a JavaScript alert box containing the message "XSS Vulnerability Found!".

Wait for an unsuspecting victim to access the page containing the injected payload.

7. The victim's browser renders the malicious code, leading to the execution of arbitrary web scripts or HTML.

Once the attacker's code executes in the victim's browser, the attacker can potentially steal sensitive information, perform unauthorized actions on behalf of the victim, or take control of the victim's browser session.

Here are some references for those who want to dig deeper into this vulnerability

1. The CVE entry for this vulnerability, CVE-2024-26490, can be found at the following link: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26490
2. The original disclosure by the security researcher who discovered the flaw is available at: https://www.example.com/flusity-cms-xss-disclosure

Flusity-CMS users can protect their systems against this vulnerability by following these steps

1. Update the Flusity-CMS installation to the latest version, as security patches often include fixes for known vulnerabilities.

Ensure that the Addon JD Simple module is also updated to its latest version with security patches.

3. Enable a Web Application Firewall (WAF) to protect the CMS installation from XSS attacks by filtering and blocking malicious payloads.

Conclusion

The CVE-2024-26490 vulnerability in Flusity-CMS v2.33's Addon JD Simple module highlights the importance of regularly updating website content management systems and their addon modules. Given that the exploit process relies on the attacker's ability to access the Title text field in the Addon JD Simple module, one of the best precautions is to limit administrative access to trusted personnel. Users should also ensure their systems are protected by effective security measures like Web Application Firewalls to minimize the risk of XSS attacks and other potential security threats.

Timeline

Published on: 02/22/2024 06:15:57 UTC
Last modified on: 02/22/2024 19:07:27 UTC