CVE-2025-4943 is a stored Cross-Site Scripting (XSS) vulnerability identified in the LA-Studio Element Kit for Elementor plugin for WordPress, affecting all versions up to and including 1.5.2. The vulnerability stems from improper neutralization of input during web page generation, specifically insufficient sanitization and escaping of the ‘data-lakit-element-link’ parameter. This flaw allows authenticated attackers with Contributor-level access or higher to inject arbitrary JavaScript code into web pages. When other users visit these compromised pages, the injected scripts execute in their browsers, potentially leading to session hijacking, privilege escalation, or unauthorized actions performed on behalf of the victim. The vulnerability has a CVSS v3.1 base score of 6.4, indicating medium severity. The attack vector is network-based, with low attack complexity, requiring privileges (Contributor or above), and no user interaction is needed for exploitation. The scope is changed, as the vulnerability affects other users beyond the attacker. Although no known exploits are currently reported in the wild, the widespread use of WordPress and Elementor plugins makes this a significant risk. The vulnerability highlights the importance of proper input validation and output encoding in web applications, especially in plugins that extend CMS functionality. The lack of available patches at the time of disclosure necessitates immediate mitigation efforts by administrators to reduce exposure until official fixes are released.

The impact of CVE-2025-4943 is primarily on the confidentiality and integrity of affected WordPress sites using the LA-Studio Element Kit for Elementor plugin. Successful exploitation allows attackers with Contributor-level access to inject malicious scripts that execute in the browsers of site visitors and administrators. This can lead to theft of session cookies, enabling account takeover, unauthorized actions performed with victim privileges, and potential distribution of malware. Although availability is not directly affected, the compromise of user accounts and data integrity can severely damage organizational reputation and trust. Given the plugin’s integration with Elementor, a popular page builder, many websites could be affected, including corporate, e-commerce, and content-driven sites. The requirement for authenticated access limits the attack surface but does not eliminate risk, as Contributor roles are common in multi-author WordPress environments. The vulnerability could be leveraged in targeted attacks against organizations relying on this plugin, especially those with less restrictive user role management. The absence of known exploits in the wild currently reduces immediate risk but does not preclude future exploitation once proof-of-concept code becomes available.

Organizations should immediately review and restrict Contributor-level user privileges to trusted individuals only, minimizing the number of users who can exploit this vulnerability. Implement strict input validation and output encoding on all user-supplied data, particularly parameters like ‘data-lakit-element-link’, either through plugin updates or custom code if patches are unavailable. Deploy a Web Application Firewall (WAF) with rules to detect and block XSS payloads targeting this parameter. Monitor logs and user activity for unusual behavior indicative of exploitation attempts. Disable or remove the LA-Studio Element Kit for Elementor plugin if it is not essential, or replace it with a secure alternative. Stay alert for official patches or updates from the plugin vendor and apply them promptly once released. Educate content contributors about the risks of injecting untrusted content and enforce secure content creation policies. Conduct regular security assessments and penetration tests focusing on CMS plugins and user role configurations to identify and remediate similar vulnerabilities proactively.