CVE-2025-11820 is a stored Cross-Site Scripting vulnerability identified in the Graphina – Charts and Graphs plugin for Elementor, a popular WordPress plugin used to create interactive charts and graphs. The vulnerability affects all versions up to and including 3.1.8. It stems from improper neutralization of input during web page generation (CWE-79), specifically due to insufficient sanitization and escaping of user-supplied data embedded in data attributes of multiple chart widgets. Authenticated users with Contributor-level permissions or higher can exploit this flaw by injecting arbitrary JavaScript code into chart widgets such as Area Chart, Line Chart, Column Chart, Donut Chart, Heatmap Chart, Radar Chart, Polar Chart, Pie Chart, Radial Chart, and Advanced Data Table. When other users access the infected pages, the malicious scripts execute in their browsers, potentially leading to session hijacking, privilege escalation, or unauthorized actions within the affected WordPress site. The vulnerability requires authentication but no additional user interaction beyond page access. The CVSS v3.1 base score is 6.4, reflecting a medium severity with network attack vector, low attack complexity, and privileges required. No patches or known exploits are currently available, increasing the urgency for organizations to implement mitigations or monitor for updates. The vulnerability’s scope is limited to WordPress sites using this specific plugin, but given the popularity of Elementor and its plugins, the attack surface is significant.

For European organizations, this vulnerability poses a risk primarily to websites and web applications built on WordPress that utilize the Graphina plugin for data visualization. Successful exploitation can lead to the injection of malicious scripts that execute in the browsers of site visitors or administrators, potentially compromising user sessions, stealing sensitive information, or enabling further attacks such as privilege escalation or defacement. This can damage organizational reputation, lead to data breaches, and disrupt business operations. Since the attack requires authenticated access at Contributor level or above, insider threats or compromised accounts increase risk. Organizations in sectors with high web presence, such as e-commerce, media, education, and government, are particularly vulnerable. Additionally, the stored nature of the XSS means the malicious payload persists, increasing exposure duration. The medium CVSS score indicates a moderate but non-trivial threat that should be addressed promptly to avoid exploitation, especially in environments with multiple users and contributors.

1. Immediately audit WordPress sites for the presence of the Graphina – Charts and Graphs plugin and identify versions up to 3.1.8. 2. Apply vendor patches or updates as soon as they become available; if no patch exists, consider disabling or uninstalling the plugin temporarily. 3. Restrict Contributor-level permissions strictly to trusted users and review user roles to minimize the number of accounts with such privileges. 4. Implement Web Application Firewall (WAF) rules to detect and block suspicious input patterns targeting chart widget data attributes. 5. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts on affected sites. 6. Conduct regular security audits and scanning for XSS vulnerabilities on WordPress sites, focusing on plugins handling user input. 7. Educate site administrators and contributors about the risks of injecting untrusted content and encourage secure content management practices. 8. Monitor site logs and user activity for signs of exploitation attempts or unusual behavior. 9. Consider using security plugins that provide input sanitization and output escaping enhancements as an additional layer of defense.