CVE-2024-11943 is a reflected Cross-Site Scripting vulnerability classified under CWE-79, found in the 워드프레스 결제 심플페이 – 우커머스 결제 플러그인 WordPress plugin developed by codemstory. The vulnerability exists because the plugin uses the WordPress function add_query_arg to manipulate URL query parameters without properly escaping user-supplied input. This improper neutralization allows attackers to inject arbitrary JavaScript code into URLs that, when clicked by a victim, execute in the context of the affected website. The vulnerability affects all plugin versions up to and including 5.2.2. Since the vulnerability is reflected, the attack vector involves an attacker crafting a malicious URL and convincing a user to click it, leading to script execution in the victim's browser. The impact includes potential theft of cookies, session tokens, or other sensitive information, as well as unauthorized actions performed on behalf of the user. The CVSS 3.1 score of 6.1 indicates medium severity, with network attack vector, low attack complexity, no privileges required, but user interaction necessary. The scope is changed because the vulnerability can affect user sessions and data integrity across the site. No patches or fixes are currently linked, and no known exploits have been reported in the wild. The vulnerability is particularly concerning for e-commerce sites using this plugin, as it can undermine user trust and lead to account compromise or fraud.

The primary impact of CVE-2024-11943 is the compromise of user confidentiality and integrity on affected WordPress sites using the vulnerable plugin. Attackers can steal session cookies or authentication tokens, enabling account hijacking or unauthorized transactions. The reflected XSS can also be used to perform phishing attacks, redirect users to malicious sites, or manipulate page content to deceive users. For e-commerce platforms, this can result in financial fraud, loss of customer trust, and reputational damage. Although availability is not directly impacted, the indirect effects of exploitation can disrupt business operations and customer relationships. Since the vulnerability requires user interaction, the scope is limited but still significant given the widespread use of WordPress and WooCommerce in online retail. Organizations worldwide that rely on this plugin for payment processing are at risk of targeted attacks, especially if users are not educated about phishing or suspicious links.

To mitigate CVE-2024-11943, organizations should immediately update the 워드프레스 결제 심플페이 – 우커머스 결제 플러그인 plugin to a patched version once available. In the absence of an official patch, administrators should implement input validation and output encoding on all URL parameters processed by the plugin, ensuring proper escaping of user-supplied data before insertion into HTML contexts. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. Educate users about the risks of clicking unknown or suspicious links, especially those related to payment or account management. Additionally, monitor web server logs for unusual URL patterns indicative of attempted exploitation. Consider deploying web application firewalls (WAFs) with rules targeting reflected XSS payloads specific to this plugin. Finally, review and harden other plugins and themes to prevent similar vulnerabilities, as reflected XSS is a common attack vector in WordPress environments.