CVE-2025-66134 identifies a Missing Authorization vulnerability in NinjaTeam's FileBird Pro plugin, specifically affecting versions up to and including 6.4.9. FileBird Pro is a WordPress plugin designed to organize media files into folders, enhancing media management capabilities. The vulnerability arises from incorrectly configured access control security levels within the plugin, allowing unauthorized users to perform actions that should be restricted. This missing authorization means that the plugin fails to properly verify whether a user has the necessary permissions before executing certain operations, potentially enabling attackers to access or manipulate files and folders they should not be able to. Although no public exploits have been reported yet, the flaw is significant because it compromises the integrity and confidentiality of media assets managed by the plugin. The vulnerability does not require user interaction but does require the attacker to have some level of access to the WordPress environment where FileBird Pro is installed. Since the CVSS score has not been assigned, the severity assessment is based on the impact on confidentiality and integrity, ease of exploitation, and scope of affected systems. The vulnerability affects all installations running vulnerable versions of FileBird Pro, which is widely used in WordPress sites globally. The lack of a patch link indicates that a fix may not yet be publicly available, so organizations must monitor vendor communications closely. The issue was reserved in late November 2025 and published in mid-December 2025, indicating recent discovery and disclosure.

For European organizations, this vulnerability poses a significant risk to the confidentiality and integrity of digital media assets managed via WordPress sites using FileBird Pro. Unauthorized access could lead to data leakage, unauthorized modification, or deletion of media files, which may disrupt business operations, damage reputations, or lead to compliance violations, especially under GDPR regulations concerning data protection. Organizations relying heavily on WordPress for content management, particularly media-heavy sites such as news agencies, marketing firms, and e-commerce platforms, are at heightened risk. The absence of public exploits reduces immediate risk but also means attackers could develop exploits rapidly once the vulnerability is widely known. The impact is amplified in environments where multiple users have access to the WordPress backend, increasing the attack surface. Additionally, unauthorized media manipulation could be leveraged as part of broader attacks, such as phishing or misinformation campaigns. The vulnerability's exploitation could also undermine trust in digital content integrity, which is critical for many European businesses and institutions.

Organizations should immediately inventory their WordPress environments to identify installations of FileBird Pro and verify the plugin version. Until a patch is released, administrators should restrict access to the WordPress backend to trusted users only and implement strict role-based access controls to minimize the risk of unauthorized actions. Monitoring and logging of user activities related to media management should be enhanced to detect suspicious behavior promptly. Employing Web Application Firewalls (WAFs) with custom rules to detect and block abnormal requests targeting FileBird Pro endpoints can provide an additional layer of defense. Organizations should subscribe to NinjaTeam's security advisories to receive timely updates and apply patches as soon as they become available. Additionally, consider isolating critical media assets or using alternative secure media management solutions if immediate patching is not feasible. Regular security audits and penetration testing focusing on plugin vulnerabilities can help identify and remediate similar issues proactively.