CVE-2022-43321: Reflected XSS Vulnerability in Shopwind v3.4.3 Affecting Page.php Component

A reflected cross-site scripting (XSS) vulnerability has been discovered in Shopwind v3.4.3, affecting the /common/library/Page.php component. This vulnerability poses a significant risk to users who interact with an affected web application, as an attacker can exploit this vulnerability to execute malicious JavaScript code in a user's browser session.

This long read post will provide details on the CVE-2022-43321 vulnerability, including code snippets, links to original references, and information on how the exploit could potentially be carried out. Read on to learn about how this vulnerability affects Shopwind and its users, and what steps should be taken to mitigate its impact.

Description of the Vulnerability

The discovered vulnerability affects the Page.php component within Shopwind v3.4.3, a popular e-commerce platform. By exploiting this vulnerability, an attacker is able to inject malicious JavaScript code into a vulnerable page, which could potentially grant them control over the victim's browser session, allowing them to steal sensitive data or perform unauthorized actions on the victim's behalf.

The core issue is that user input is not properly sanitized, allowing for the execution of JavaScript code when rendering a vulnerable page. As a result, this enables a malicious user to inject malicious scripts that execute in the context of a user's web browser.

The following code snippet demonstrates the vulnerable component in /common/library/Page.php

class Page {
    ...
    public function render($view_file, $params = array()) {
        ...
        if (file_exists($layout_file)) {
            include $layout_file;
        } else {
            throw new Exception("The layout $layout_file does not exist!");
        }
        ...
    }
}

The vulnerability can be exploited by sending a specially crafted URL that contains malicious JavaScript code. For example, an attacker could craft the following URL:

http://[VULNERABLE_DOMAIN]/index.php?layout=<script>/* Your malicious code here */</script>

When a user clicks on this URL or is redirected to it, the malicious JavaScript code will execute in their browser.

Original References and External Links

1. Official CVE Details: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-43321
2. NVD Database Entry: https://nvd.nist.gov/vuln/detail/CVE-2022-43321
3. XSS OWASP Guide: https://owasp.org/www-community/attacks/xss/
4. Shopwind GitHub Repository: https://github.com/Shopwind/shopwind

Mitigation and Recommendations

If you are using Shopwind v3.4.3, it is strongly recommended that you apply the following measures to mitigate the risk of this vulnerability:

Update to the latest version of Shopwind, if available.

2. Apply proper input validation and output encoding to sanitize user inputs in the affected components.
3. Implement a security policy like Content Security Policy (CSP) to control the sources from which scripts can be executed in browsers.

Educate users about the dangers of clicking on unknown links or visiting untrusted websites.

By implementing these measures, you will reduce the threat posed by this reflected XSS vulnerability, and help secure your Shopwind website against potential attacks.

Timeline

Published on: 11/09/2022 14:15:00 UTC
Last modified on: 11/10/2022 15:10:00 UTC