CVE-2025-46533 is a stored Cross-site Scripting (XSS) vulnerability classified under CWE-79, affecting the 'Landing pages and Domain aliases for WordPress' plugin developed by wpdrift.no. This vulnerability arises due to improper neutralization of input during web page generation, allowing malicious scripts to be stored and subsequently executed in the context of users visiting affected WordPress sites. Specifically, the flaw exists in versions up to 0.8 of the plugin, though exact affected versions are not fully enumerated. Stored XSS vulnerabilities enable attackers to inject malicious JavaScript code that is permanently stored on the target server, typically within input fields or parameters that are rendered without adequate sanitization or encoding. When legitimate users access the compromised pages, the malicious scripts execute in their browsers, potentially leading to session hijacking, credential theft, defacement, or redirection to malicious sites. The vulnerability does not currently have known exploits in the wild, and no patches or fixes have been publicly released as of the publication date (April 24, 2025). The plugin is used to create landing pages and manage domain aliases within WordPress environments, which are widely deployed for marketing, content delivery, and domain management purposes. The improper input handling indicates a failure to sanitize or encode user-supplied data before embedding it into the HTML output, a common vector for XSS attacks. Given the nature of stored XSS, the attack surface includes any user input fields or parameters that the plugin processes and displays on landing pages or domain alias pages without proper validation or escaping.

For European organizations, this vulnerability poses a significant risk primarily to websites leveraging WordPress with the affected wpdrift.no plugin. Stored XSS can lead to unauthorized access to user sessions, theft of sensitive information such as login credentials or personal data, and potential compromise of administrative accounts. This can result in reputational damage, regulatory non-compliance (notably under GDPR), and financial losses due to fraud or remediation costs. Organizations using the plugin for customer-facing landing pages or domain alias management may face defacement or redirection attacks, undermining trust and business continuity. Additionally, attackers could leverage the vulnerability to deliver malware or conduct phishing campaigns targeting European users. The absence of known exploits suggests a window of opportunity for proactive mitigation; however, the medium severity rating indicates that while the vulnerability is serious, it requires some level of user interaction (visiting the compromised page) and does not directly allow remote code execution on the server. The impact on confidentiality and integrity is moderate, while availability is less likely to be affected directly. Given the widespread use of WordPress in Europe, especially among SMEs and marketing agencies, the potential scope of affected systems is considerable.

1. Immediate mitigation should include disabling or removing the affected wpdrift.no plugin until an official patch is released. 2. Implement Web Application Firewall (WAF) rules specifically designed to detect and block XSS payloads targeting the plugin’s input fields and URL parameters. 3. Conduct thorough input validation and output encoding on all user-supplied data within the WordPress environment, particularly focusing on the landing pages and domain alias functionalities. 4. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing affected sites. 5. Monitor web server logs and user reports for unusual activity or signs of XSS exploitation attempts. 6. Educate site administrators and content managers on the risks of injecting untrusted content and encourage regular security audits of plugins and themes. 7. Once available, promptly apply vendor patches or updates addressing this vulnerability. 8. Consider isolating or sandboxing the plugin’s functionality to limit the impact of potential exploitation. 9. Use security scanning tools to detect stored XSS vulnerabilities in the WordPress environment proactively.