CVE-2025-66133 identifies a missing authorization vulnerability in the WP Cookie Notice for GDPR, CCPA & ePrivacy Consent plugin developed by WP Legal Pages, affecting all versions up to and including 4.0.7. This vulnerability stems from improperly configured access control mechanisms within the plugin, which manages cookie consent notices to comply with privacy regulations such as GDPR and CCPA. The flaw allows remote attackers to access certain functionalities or data without any authentication or user interaction, as indicated by the CVSS vector (AV:N/AC:L/PR:N/UI:N). While the vulnerability primarily impacts confidentiality by potentially exposing sensitive configuration or consent data, it does not affect the integrity or availability of the system. The plugin is commonly used on WordPress websites to display cookie consent banners and manage user consent preferences, making it a critical component for compliance with European data protection laws. No public exploits have been reported yet, but the vulnerability's presence in a widely deployed plugin poses a risk if left unpatched. The absence of a patch link suggests that a fix may be forthcoming or that users should monitor vendor advisories closely. The vulnerability was reserved and published in late 2025, highlighting the need for timely response from site administrators. Overall, this issue represents a moderate risk due to its ease of exploitation and potential to leak confidential information without requiring credentials or user action.

For European organizations, this vulnerability could lead to unauthorized disclosure of sensitive consent-related data managed by the WP Cookie Notice plugin. Such data might include user consent preferences or configuration details that could be leveraged for further attacks or to undermine compliance with GDPR and other privacy laws. Exposure of this information could damage organizational reputation, invite regulatory scrutiny, and erode user trust. Since the plugin is integral to managing cookie consent, exploitation might also disrupt compliance reporting or auditing processes. Organizations heavily reliant on WordPress for their web presence, especially those in sectors with stringent privacy requirements such as finance, healthcare, and e-commerce, face increased risk. Although the vulnerability does not directly compromise system integrity or availability, the confidentiality breach alone can have significant legal and operational consequences under European data protection frameworks. The lack of authentication and user interaction requirements makes exploitation straightforward, increasing the likelihood of opportunistic attacks. However, the absence of known exploits in the wild currently limits immediate widespread impact.

European organizations should take proactive steps to mitigate this vulnerability beyond generic patching advice. First, monitor WP Legal Pages’ official channels for the release of a security patch addressing CVE-2025-66133 and apply it promptly. Until a patch is available, restrict access to the plugin’s administrative and configuration endpoints using web application firewalls (WAFs) or IP whitelisting to prevent unauthorized remote access. Conduct thorough audits of WordPress user roles and permissions to ensure that only trusted administrators have access to sensitive plugin settings. Implement logging and monitoring to detect unusual access patterns or attempts to exploit the vulnerability. Consider deploying runtime application self-protection (RASP) tools that can detect and block unauthorized access attempts in real time. Additionally, review and harden overall WordPress security posture by disabling unused plugins, enforcing strong authentication mechanisms, and keeping the WordPress core and all plugins updated. Finally, prepare incident response plans that include steps to handle potential data exposure related to cookie consent information, ensuring compliance with GDPR breach notification requirements.