CVE-2024-13319 is a reflected Cross-Site Scripting (XSS) vulnerability identified in the Themify Builder plugin for WordPress, a popular page builder tool used to create and customize website layouts. The vulnerability exists due to the improper neutralization of input during web page generation, specifically through the use of the WordPress function add_query_arg without adequate escaping of URL parameters. This flaw allows unauthenticated attackers to inject arbitrary JavaScript code into URLs that, when visited by a user, execute within the victim's browser context. The vulnerability affects all versions up to and including 7.6.5 of the Themify Builder plugin. Exploitation requires no authentication but does require user interaction, such as clicking a malicious link crafted by the attacker. The reflected nature of the XSS means the malicious script is not stored on the server but reflected off the vulnerable page. The CVSS v3.1 base score is 6.1, indicating a medium severity level, with attack vector network, low attack complexity, no privileges required, user interaction required, and scope changed. The impact includes limited confidentiality and integrity loss, such as session hijacking, theft of cookies or credentials, or performing actions on behalf of the user. No known exploits have been reported in the wild to date. The vulnerability is tracked under CWE-79 (Improper Neutralization of Input During Web Page Generation).

The primary impact of CVE-2024-13319 is the potential compromise of user confidentiality and integrity on websites using the Themify Builder plugin. Attackers can steal session cookies, credentials, or other sensitive information accessible via the browser, leading to account takeover or unauthorized actions performed on behalf of users. This can result in defacement, phishing, or further exploitation of the affected website and its users. Although availability is not directly impacted, the reputational damage and potential data breaches can have significant operational and financial consequences for organizations. Since the vulnerability requires user interaction, the risk depends on the ability of attackers to lure users into clicking malicious links. The widespread use of WordPress and Themify Builder in diverse sectors increases the scope of affected systems globally, particularly for organizations relying on this plugin for website customization.

1. Apply patches or updates from the Themifyme vendor as soon as they become available to address this vulnerability. 2. Until a patch is released, implement strict input validation and output encoding on all URL parameters processed by the plugin to prevent script injection. 3. Use Web Application Firewalls (WAFs) with rules specifically designed to detect and block reflected XSS payloads targeting Themify Builder. 4. Educate users and administrators about the risks of clicking unsolicited or suspicious links, especially those containing unusual URL parameters. 5. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts on affected websites. 6. Regularly audit and monitor web server logs for unusual URL patterns or repeated attempts to exploit this vulnerability. 7. Consider disabling or replacing the Themify Builder plugin if immediate patching is not feasible and risk is high.