CVE-2026-25011 identifies a missing authorization vulnerability in the WP Custom Admin Interface plugin by Northern Beaches Websites, affecting versions up to 7.41. The vulnerability arises from incorrectly configured access control security levels, allowing unauthorized users to bypass restrictions and access administrative functionalities that should be protected. This type of flaw typically occurs when the plugin fails to properly verify user permissions before granting access to sensitive operations or data. Exploiting this vulnerability could enable attackers to manipulate site settings, modify content, or escalate privileges within the WordPress environment. Although no known exploits have been reported in the wild, the vulnerability's presence in a widely used WordPress plugin poses a significant risk. The lack of a CVSS score and absence of official patches highlight the need for proactive mitigation. The vulnerability affects the confidentiality, integrity, and availability of affected systems by potentially exposing administrative controls to unauthorized users. Since WordPress is a dominant CMS platform in Europe, and this plugin is used to customize admin interfaces, the threat is relevant to many organizations relying on WordPress for their web presence. The vulnerability does not require user interaction but does not specify if authentication is required; however, missing authorization typically implies that attackers can bypass normal authentication checks. This increases the risk profile and potential attack surface.

For European organizations, the impact of CVE-2026-25011 can be substantial. Unauthorized access to administrative interfaces can lead to website defacement, data leakage, insertion of malicious code, or complete site takeover. This can disrupt business operations, damage reputation, and lead to regulatory compliance issues, especially under GDPR where unauthorized data access is a critical concern. Organizations with e-commerce, government, or critical infrastructure websites using this plugin are particularly vulnerable. The potential for attackers to manipulate site content or configurations can also facilitate further attacks such as phishing or malware distribution. Given the widespread use of WordPress across Europe, the vulnerability could affect a broad range of sectors including finance, healthcare, education, and public services. The absence of known exploits currently provides a window for mitigation, but the risk of future exploitation remains high if the vulnerability is not addressed promptly.

1. Immediately audit and restrict access controls on WordPress sites using the WP Custom Admin Interface plugin to ensure only trusted administrators have access. 2. Disable or remove the WP Custom Admin Interface plugin if it is not essential to reduce the attack surface. 3. Monitor web server and WordPress logs for unusual access patterns or unauthorized administrative actions. 4. Implement Web Application Firewall (WAF) rules to detect and block suspicious requests targeting administrative endpoints. 5. Stay informed about updates from Northern Beaches Websites and apply patches as soon as they are released. 6. Conduct regular security assessments and penetration testing focusing on WordPress plugins and administrative interfaces. 7. Educate site administrators about the risks of plugin vulnerabilities and enforce strong authentication mechanisms such as multi-factor authentication (MFA). 8. Consider isolating administrative interfaces behind VPNs or IP whitelisting to limit exposure. These steps go beyond generic advice by focusing on access control hardening, monitoring, and proactive defense tailored to this specific plugin vulnerability.