CVE-2025-64264 identifies a stored Cross-site Scripting (XSS) vulnerability in the Aman Popup addon for Ninja Forms, a popular WordPress plugin used to create and manage forms with popup functionality. The vulnerability stems from improper neutralization of user-supplied input during web page generation, which allows attackers to inject malicious scripts that persist in the application. This stored XSS can be triggered when a victim views the affected page, potentially leading to session hijacking, defacement, or redirection to malicious sites. The vulnerability affects all versions of the Popup addon up to and including 3.5.1. Exploitation requires an attacker to have high privileges (likely administrative or editor roles) and involves user interaction, such as an administrator viewing a compromised form or popup. The CVSS 3.1 base score is 5.9, indicating medium severity, with attack vector being network-based, low attack complexity, but requiring privileges and user interaction. The vulnerability impacts confidentiality, integrity, and availability to a limited extent, as the attacker can execute arbitrary scripts in the context of the affected site. No public exploits are known at this time, and no patches have been linked yet, but the vulnerability is publicly disclosed and should be addressed promptly. The issue is particularly relevant for organizations using WordPress with Ninja Forms and the Aman Popup addon, as it could be leveraged in targeted attacks to compromise internal or customer-facing web applications.

For European organizations, this vulnerability poses a moderate risk primarily to websites and web applications using WordPress with the Ninja Forms plugin and the Aman Popup addon. Successful exploitation could lead to unauthorized script execution, enabling attackers to steal session cookies, deface websites, or conduct phishing attacks by injecting malicious content. This could result in reputational damage, data leakage, or disruption of services. Since exploitation requires high privileges and user interaction, the threat is more significant for organizations with many users having administrative or editor roles on their WordPress sites. Industries with high reliance on web presence, such as e-commerce, media, and public services, could face operational impacts and regulatory scrutiny under GDPR if personal data is compromised. The vulnerability could also be leveraged as a foothold for further attacks within the network. Given the widespread use of WordPress in Europe, the potential impact is non-negligible, especially for organizations that have not implemented strict access controls or input validation.

1. Monitor for official patches or updates from Aman or Ninja Forms and apply them immediately once available. 2. Restrict administrative access to the WordPress backend and the Ninja Forms plugin to trusted personnel only, minimizing the number of users with high privileges. 3. Implement strict input validation and sanitization on all user inputs related to the popup addon to prevent malicious script injection. 4. Deploy Content Security Policy (CSP) headers to limit the execution of unauthorized scripts on affected web pages. 5. Regularly audit user roles and permissions within WordPress to ensure least privilege principles are enforced. 6. Use Web Application Firewalls (WAF) with rules targeting XSS attack patterns to detect and block exploitation attempts. 7. Educate administrators and users about the risks of interacting with untrusted content or links within the WordPress environment. 8. Conduct periodic security assessments and penetration testing focusing on WordPress plugins and custom addons to identify similar vulnerabilities early.