CVE-2022-36433: Exploiting Amasty Blog Pro 2.10.3 Plugin for Magento 2 - XSS Vulnerability in Short_Content and Full

A new vulnerability (CVE-2022-36433) has been discovered in the Amasty Blog Pro 2.10.3 plugin for Magento 2. This vulnerability allows attackers to inject malicious JavaScript code into the short_content and full_content fields of blog posts, leading to Cross-Site Scripting (XSS) attacks against users of the admin panel. In this post, we will dive into the details of this vulnerability and demonstrate how an attacker can exploit it to compromise the security of the affected system. Stay with us to learn how to protect your Magento 2 store from this threat.

Vulnerability Analysis

The Amasty Blog Pro plugin provides blog-post creation functionality to Magento 2 stores. The short_content and full_content fields are used to store the blog post summaries and the main content, respectively. The plugin does not sufficiently sanitize user input in these fields, making it possible for an attacker to inject malicious JavaScript code.

The injected code is executed when a user with admin privileges accesses the post preview (posts/preview) or post saving (posts/save) endpoints. An attacker can exploit this vulnerability to perform arbitrary actions on behalf of the affected user, potentially compromising sensitive data and system functionality.

Exploit Details

Let's take a closer look at how an attacker can exploit this vulnerability. The steps below demonstrate how to inject malicious JavaScript code into the short_content and full_content fields of a blog post:

1. Log in to the admin panel of the Amasty Blog Pro plugin (you may need to create a user account with limited privileges first).

In the "Short Content" (short_content) field, enter the following malicious JavaScript code

<script>alert('XSS in Short_Content!');</script>

In the "Full Content" (full_content) field, enter the following malicious JavaScript code

<script>alert('XSS in Full_Content!');</script>

Save the blog post.

7. Now, whenever an admin user accesses the posts/preview or posts/save endpoints for this specific blog post, the injected JavaScript code will execute, and the attacker can perform arbitrary actions on behalf of the affected user.

Original References

The vulnerability was discovered and reported by [Security Researcher's Name / Organization]. Links to the original references can be found below:

1. [Link to the researcher's blog post / publication]

To protect your Magento 2 store from this vulnerability, follow the steps below

1. Update the Amasty Blog Pro plugin to the latest version (if available), which includes a fix for this vulnerability.

Ensure that your Magento 2 installation is up-to-date with the latest security patches.

3. Regularly audit the user accounts and privileges in your Magento 2 admin panel, and restrict access to only the necessary functionality.

4. Implement a web application firewall (WAF) to detect and block potential XSS attacks, even before they reach your Magento 2 store.

Conclusion

The CVE-2022-36433 vulnerability in the Amasty Blog Pro 2.10.3 plugin for Magento 2 demonstrates the importance of properly sanitizing user input to prevent Cross-Site Scripting (XSS) attacks. It's crucial for plugin developers and store owners to stay on top of security updates and implement best practices to safeguard their systems and user data.

By staying informed about the latest vulnerabilities and applying the necessary updates and protections, you can keep your Magento 2 store safe from cyberattacks and ensure the security of your users and business.

Timeline

Published on: 11/29/2022 13:15:00 UTC
Last modified on: 12/01/2022 21:50:00 UTC