CVE-2025-11814 is a stored Cross-Site Scripting (XSS) vulnerability identified in the Ultimate Addons for WPBakery plugin for WordPress, maintained by Brainstorm Force. This vulnerability exists in all versions up to, but not including, version 3.21.1. The root cause is improper neutralization of input during web page generation, specifically insufficient sanitization and escaping of user-supplied data before rendering it on web pages. This flaw allows unauthenticated attackers to inject arbitrary JavaScript code into pages managed by the plugin. When legitimate users visit these compromised pages, the malicious scripts execute within their browsers, potentially enabling attackers to steal cookies, session tokens, or other sensitive information, perform actions on behalf of the user, or redirect users to malicious sites. The CVSS v3.1 base score is 6.4, reflecting medium severity with an attack vector of network (remote), low attack complexity, requiring low privileges but no user interaction. The scope is changed, indicating that the vulnerability affects components beyond the initially vulnerable plugin, potentially impacting the broader WordPress environment. No public exploits or active exploitation have been reported yet, but the vulnerability's nature and ease of exploitation make it a credible threat. The plugin is widely used to enhance WPBakery page builder functionality, which is popular among WordPress users for creating rich content layouts. The vulnerability's impact is primarily on confidentiality and integrity, with no direct availability impact. The lack of a patch at the time of publication necessitates immediate attention from administrators to monitor for updates and apply mitigations.

For European organizations, the impact of CVE-2025-11814 can be significant, especially for those relying on WordPress sites enhanced by the Ultimate Addons for WPBakery plugin. Exploitation could lead to unauthorized access to user credentials, session hijacking, and data leakage, undermining user trust and potentially violating data protection regulations such as GDPR. Public-facing websites, including e-commerce platforms, media outlets, and corporate portals, are at heightened risk as attackers can leverage the vulnerability to execute malicious scripts targeting visitors. This can result in reputational damage, financial loss, and legal consequences. Since the vulnerability allows unauthenticated remote exploitation without user interaction, the attack surface is broad. Additionally, the scope change in the CVSS vector suggests potential cascading effects on other components or plugins integrated with WPBakery, increasing the risk of widespread compromise. Organizations with limited patch management processes or those using outdated plugin versions are particularly vulnerable. The absence of known exploits in the wild currently provides a window for proactive defense, but the medium severity rating indicates that attackers may develop exploits soon, increasing urgency for mitigation.

1. Monitor official Brainstorm Force channels and WordPress plugin repositories for the release of a security patch addressing CVE-2025-11814 and apply it immediately upon availability. 2. In the interim, restrict access to administrative interfaces and limit plugin usage to trusted users to reduce the risk of injection. 3. Implement robust input validation and output encoding on all user-supplied data within the WordPress environment, especially for content managed by WPBakery and its addons. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and mitigate the impact of potential XSS payloads. 5. Conduct regular security audits and vulnerability scans focusing on WordPress plugins and themes to detect anomalous behavior or injected scripts. 6. Educate site administrators and developers on secure coding practices and the risks associated with third-party plugins. 7. Consider using Web Application Firewalls (WAFs) with custom rules to detect and block suspicious requests targeting the vulnerable plugin. 8. Backup website data regularly to enable rapid recovery in case of compromise. 9. Review user permissions and minimize privileges to reduce the attack surface. 10. Stay informed about emerging threats related to WordPress and its ecosystem to respond promptly.