CVE-2025-14635 is a stored Cross-Site Scripting (XSS) vulnerability classified under CWE-79 affecting the Happy Addons for Elementor plugin for WordPress. The flaw exists in all versions up to and including 3.20.3 due to improper neutralization of input during web page generation. Specifically, the 'ha_page_custom_js' parameter lacks sufficient input sanitization and output escaping, allowing authenticated users with Contributor-level privileges or higher to inject arbitrary JavaScript code into pages. This is significant because the Custom JS feature is intended to be restricted to Administrators, but the vulnerability bypasses this role restriction, enabling lower-privileged users to embed malicious scripts. When other users visit the compromised pages, the injected scripts execute in their browsers, potentially leading to session hijacking, credential theft, or further compromise of the WordPress site. The vulnerability is remotely exploitable over the network without user interaction but requires authenticated access with at least Contributor privileges. The CVSS v3.1 base score is 6.4, indicating medium severity with low attack complexity and partial impact on confidentiality and integrity but no impact on availability. No public exploits have been reported yet, but the vulnerability poses a significant risk due to the widespread use of Elementor and its add-ons in WordPress sites globally. The lack of patches at the time of publication necessitates immediate mitigation efforts by site administrators.

The impact of CVE-2025-14635 is primarily on the confidentiality and integrity of affected WordPress sites. Successful exploitation allows authenticated users with Contributor-level access or higher to inject persistent malicious JavaScript, which executes in the context of other users visiting the infected pages. This can lead to session hijacking, unauthorized actions performed on behalf of users, theft of sensitive information such as cookies or credentials, and potential privilege escalation if administrative sessions are compromised. While availability is not directly affected, the reputational damage and potential data breaches can be severe. Organizations relying on WordPress sites with the vulnerable plugin may face data leakage, unauthorized access, and compliance violations. The requirement for authenticated access limits the attack surface but does not eliminate risk, especially in environments with multiple contributors or where account compromise is possible. The vulnerability could be leveraged in targeted attacks against high-value websites, including e-commerce, media, and corporate portals using Elementor. The absence of known exploits in the wild provides a window for remediation, but the medium severity score indicates that timely action is necessary to prevent exploitation.

To mitigate CVE-2025-14635, organizations should first verify if they are using the Happy Addons for Elementor plugin and identify the version in use. Since no official patches are available at the time of disclosure, immediate steps include restricting Contributor-level and higher user permissions to trusted personnel only, minimizing the number of users with such privileges. Administrators should audit existing pages for injected custom JavaScript and remove any suspicious code. Implementing a Web Application Firewall (WAF) with rules to detect and block malicious script injections targeting the 'ha_page_custom_js' parameter can provide temporary protection. Additionally, site owners should monitor user activity logs for unusual behavior indicative of exploitation attempts. Once a patch is released, prompt updating of the plugin is essential. As a longer-term measure, consider applying Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and regularly review plugin permissions and roles to enforce the principle of least privilege. Regular backups and incident response plans should be in place to recover from potential compromises.