CVE-2025-63055 is a stored Cross-site Scripting (XSS) vulnerability found in the Master Addons for Elementor plugin, a widely used WordPress extension developed by Liton Arefin. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing attackers to inject malicious JavaScript code that is stored persistently on the affected site. When other users or administrators visit the compromised pages, the malicious script executes in their browsers, potentially leading to session hijacking, credential theft, unauthorized actions, or the delivery of malware. The affected versions include all releases up to and including 2.0.9.9, with no earlier version specified. Exploitation requires no authentication or special privileges, and no user interaction beyond visiting the infected page is necessary, increasing the attack surface. Although no public exploits have been reported yet, the vulnerability’s nature and the popularity of the plugin make it a significant risk. The lack of a CVSS score indicates the need for an independent severity assessment. The vulnerability impacts the confidentiality and integrity of user data and website content, with potential availability impacts if leveraged for defacement or malware distribution. The plugin’s widespread use in European organizations’ websites, especially in sectors relying on WordPress for e-commerce and content management, amplifies the threat. Mitigation currently relies on applying patches once released, enhancing input sanitization, and deploying Content Security Policies to limit script execution. Monitoring for suspicious activity and educating administrators about the risks of stored XSS are also critical steps.

For European organizations, this stored XSS vulnerability poses a significant threat to website security and user trust. Exploitation can lead to unauthorized access to user sessions, theft of sensitive information such as login credentials, and manipulation of website content. This can result in reputational damage, regulatory penalties under GDPR for data breaches, and financial losses especially for e-commerce platforms. The persistent nature of the XSS means that malicious scripts remain active until removed, increasing the window of exposure. Organizations relying on the Master Addons for Elementor plugin for customer-facing websites or internal portals are particularly vulnerable. Attackers could leverage this vulnerability to conduct phishing campaigns, spread malware, or pivot to further network compromise. The impact extends beyond individual sites to the broader ecosystem, as compromised websites can be used to attack visitors or other connected systems. Given the plugin’s popularity in Europe, the risk of targeted attacks or automated exploitation campaigns is elevated, especially in countries with high WordPress usage and valuable online assets.

1. Monitor Liton Arefin’s official channels and security advisories for patches addressing CVE-2025-63055 and apply updates immediately upon release. 2. Until patches are available, implement strict input validation and sanitization on all user inputs handled by the plugin, using server-side controls to neutralize potentially malicious content. 3. Deploy Content Security Policies (CSP) that restrict the execution of inline scripts and limit sources of executable code to trusted domains, mitigating the impact of injected scripts. 4. Conduct thorough security audits of websites using the affected plugin to identify and remove any malicious scripts already injected. 5. Educate website administrators and developers about the risks of stored XSS and best practices for secure coding and plugin management. 6. Use Web Application Firewalls (WAF) with rules tuned to detect and block XSS payloads targeting the plugin’s known vulnerable endpoints. 7. Regularly back up website data and configurations to enable rapid recovery in case of compromise. 8. Limit plugin usage to only necessary features and consider alternative plugins with better security track records if immediate patching is not feasible.