CVE-2024-4365 is a stored cross-site scripting vulnerability identified in the Advanced iFrame plugin for WordPress, developed by mdempfle. The flaw exists due to insufficient sanitization and escaping of the 'add_iframe_url_as_param_direct' parameter, which is used to embed iframe URLs directly into pages. This vulnerability allows authenticated users with contributor-level or higher permissions to inject arbitrary JavaScript code that is stored persistently and executed in the context of any user who views the affected page. The vulnerability affects all versions up to and including 2024.3. The attack vector is remote network-based, requiring low attack complexity and no user interaction, but does require authentication with contributor or higher privileges. The vulnerability impacts confidentiality and integrity by enabling script execution that can steal session tokens, manipulate page content, or perform actions on behalf of users. The scope is changed because the injected script can affect other users beyond the attacker. The CVSS 3.1 base score is 6.4, reflecting medium severity. No public exploits or patches are currently available, increasing the urgency for administrators to monitor and apply updates once released. This vulnerability is classified under CWE-79, a common web application security weakness related to improper neutralization of input during web page generation.

The primary impact of CVE-2024-4365 is the potential for stored cross-site scripting attacks that compromise user confidentiality and integrity within affected WordPress sites. Attackers with contributor-level access can inject malicious scripts that execute in the browsers of site visitors or administrators, potentially leading to session hijacking, credential theft, unauthorized actions, or defacement. Although availability is not directly impacted, the trustworthiness and security of the website are undermined, which can lead to reputational damage and loss of user confidence. Organizations relying on the Advanced iFrame plugin are at risk of targeted attacks, especially if they allow contributor-level users or if their sites have high traffic. The vulnerability's ability to affect multiple users and its persistence make it a significant threat vector for web-based attacks. The lack of known exploits in the wild currently limits immediate widespread damage, but the medium severity and ease of exploitation warrant proactive mitigation.

To mitigate CVE-2024-4365, organizations should first verify if they use the Advanced iFrame plugin and identify the version in use. Immediate steps include restricting contributor-level permissions to trusted users only, minimizing the number of users with such privileges to reduce the attack surface. Administrators should monitor for plugin updates or patches from the vendor and apply them promptly once available. In the interim, implementing web application firewall (WAF) rules to detect and block suspicious payloads targeting the 'add_iframe_url_as_param_direct' parameter can help reduce risk. Additionally, site owners should audit existing iframe URLs and pages for injected scripts and remove any malicious content. Employing Content Security Policy (CSP) headers can limit the impact of injected scripts by restricting script sources. Regular security reviews and user permission audits are recommended to prevent unauthorized privilege escalation. Finally, educating contributors about safe input practices and monitoring logs for unusual activity can further enhance defense.