Mitigation Strategies

To mitigate this vulnerability, you should update the Easy Cart plugin for WordPress to a version later than 1.8 where the issue is fixed.

Additionally, restrict Contributor-level and higher user access to trusted users only, as the vulnerability requires authenticated users with at least Contributor privileges to exploit.

Consider implementing additional input sanitization and output escaping on shortcode attributes if you cannot immediately update the plugin.

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Executive Summary

The Easy Cart plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in its 'add_to_cart' shortcode in all versions up to and including 1.8. This happens because the plugin does not properly sanitize and escape user-supplied shortcode attributes. Although it uses sanitize_text_field() to remove HTML tags, this function does not escape double quote characters. As a result, an attacker can break out of the HTML attribute context and inject malicious scripts.

Specifically, the vulnerability exists in the ectp_add_to_cart() function, which processes attributes like 'itemid', 'product_name', 'product_desc', 'product_qty', and 'price'. Authenticated users with Contributor-level access or higher can exploit this to inject arbitrary web scripts that execute whenever a user views the affected page.

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Impact Analysis

This vulnerability allows authenticated attackers with Contributor-level access or above to inject malicious scripts into pages via the 'add_to_cart' shortcode. These scripts execute in the browsers of users who visit the infected pages.

• It can lead to theft of user credentials or session tokens.
• It can enable unauthorized actions on behalf of users.
• It can result in defacement or manipulation of website content.
• It may damage user trust and the reputation of the website.

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Compliance Impact

The vulnerability allows authenticated attackers with Contributor-level access and above to inject arbitrary web scripts via stored cross-site scripting (XSS). This can lead to unauthorized access to user data or session hijacking, potentially compromising confidentiality and integrity of personal information.

Such security weaknesses can impact compliance with standards like GDPR and HIPAA, which require protection of personal data and prevention of unauthorized access or disclosure. Failure to mitigate this vulnerability could result in violations of these regulations due to exposure of sensitive user information through malicious scripts.

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