CVE-2026-1210 is a stored Cross-Site Scripting (XSS) vulnerability identified in the Happy Addons for Elementor plugin for WordPress, a widely used plugin that extends Elementor page builder functionality. The vulnerability exists due to improper neutralization of input during web page generation, specifically via the '_elementor_data' meta field. This field is insufficiently sanitized and escaped, allowing authenticated users with Contributor-level privileges or higher to inject arbitrary JavaScript code that is stored persistently in the database. When other users, including administrators or editors, access the infected pages, the malicious scripts execute in their browsers, potentially leading to session hijacking, privilege escalation, or unauthorized actions within the WordPress environment. The vulnerability affects all versions up to and including 3.20.7. The CVSS 3.1 base score of 6.4 reflects a medium severity, with an attack vector of network (remote), low attack complexity, requiring privileges (Contributor or above), no user interaction, and a scope change indicating that the vulnerability can impact resources beyond the initially compromised component. No public exploits have been reported yet, but the presence of authenticated access requirements limits immediate widespread exploitation. However, given the popularity of Elementor and its addons, this vulnerability poses a significant risk to websites relying on this plugin for content management and presentation. The lack of a published patch link suggests that users should monitor vendor updates closely and apply fixes promptly once available.

For European organizations, this vulnerability can lead to unauthorized script execution within their WordPress sites, compromising user sessions, stealing sensitive data, or defacing web content. Since the attack requires authenticated access at Contributor level or above, insider threats or compromised accounts pose a significant risk. The impact on confidentiality and integrity is moderate, as attackers can manipulate page content and potentially escalate privileges or harvest credentials. Availability is not directly affected. Organizations relying heavily on WordPress with Elementor and Happy Addons plugins, especially those handling sensitive customer data or providing critical services via their websites, face reputational damage and potential regulatory consequences under GDPR if personal data is exposed. The vulnerability could also be leveraged as a foothold for further attacks within corporate networks if administrative users are targeted. Given the widespread use of WordPress in Europe, the threat is relevant across multiple sectors including e-commerce, media, education, and government websites.

Organizations should immediately audit their WordPress installations to identify the presence of the Happy Addons for Elementor plugin and verify the version in use. Until an official patch is released, restrict Contributor-level and higher privileges to trusted users only, and implement strict access controls and monitoring for suspicious activities. Employ Web Application Firewalls (WAFs) with custom rules to detect and block malicious payloads targeting the '_elementor_data' meta field. Regularly review and sanitize user-generated content and metadata fields. Enable Content Security Policy (CSP) headers to limit the execution of unauthorized scripts. Conduct security awareness training for administrators and content editors to recognize phishing or social engineering attempts that could lead to account compromise. Once a patch is available, prioritize immediate deployment. Additionally, consider implementing multi-factor authentication (MFA) to reduce the risk of account takeover. Continuous monitoring of logs and anomaly detection can help identify exploitation attempts early.