CVE-2025-66058 is a Missing Authorization vulnerability classified under CWE-862 found in the PickPlugins Post Grid and Gutenberg Blocks WordPress plugin, affecting versions up to 2.3.17. This vulnerability arises from incorrectly configured access control security levels, allowing users with low privileges (PR:L) to perform unauthorized actions over the network (AV:N) without requiring user interaction (UI:N). The vulnerability impacts confidentiality (C:H) but does not affect integrity or availability (I:N/A:N). Essentially, the plugin fails to properly verify whether a user is authorized to access or manipulate certain data or functionality, leading to potential unauthorized data exposure. The CVSS 3.1 base score is 6.5, reflecting a medium severity level. Although no exploits have been reported in the wild, the vulnerability poses a risk to websites using this plugin, particularly those that handle sensitive or private content. The issue is significant because WordPress powers a large portion of websites globally, and plugins like Post Grid and Gutenberg Blocks are commonly used to enhance content presentation. Attackers could leverage this flaw to access confidential information or perform unauthorized read operations, undermining data confidentiality. The vulnerability was reserved in November 2025 and published in December 2025, but no official patches or mitigations have been linked yet, indicating organizations must monitor vendor updates closely. The vulnerability’s exploitation requires only low privileges, making it easier for attackers who have some access to escalate their capabilities or extract sensitive data. This highlights the importance of strict access control enforcement in WordPress plugins, especially those managing content display and user interactions.

For European organizations, the primary impact of CVE-2025-66058 is the potential unauthorized disclosure of sensitive or confidential information managed through WordPress sites using the affected PickPlugins Post Grid and Gutenberg Blocks plugin. This can lead to data breaches, loss of customer trust, and regulatory non-compliance, especially under GDPR which mandates strict data protection measures. Since the vulnerability does not affect integrity or availability, the threat is mainly related to confidentiality breaches. Organizations with public-facing websites or intranets that use this plugin are at risk of unauthorized data access by low-privileged users or attackers who have gained limited access. This could include exposure of internal content, user data, or proprietary information. The ease of exploitation (no user interaction required and low privileges sufficient) increases the risk profile. Additionally, the lack of current known exploits does not eliminate the risk, as attackers may develop exploits once the vulnerability details become widely known. The impact is heightened for sectors with sensitive data such as finance, healthcare, and government services, which are prevalent in Europe. Failure to address this vulnerability could result in reputational damage, legal penalties, and operational disruptions due to incident response efforts.

1. Monitor PickPlugins official channels for security updates and apply patches immediately once available to remediate the vulnerability. 2. In the absence of a patch, restrict access to the affected plugin’s functionalities by limiting user roles and permissions to the minimum necessary, especially for low-privileged users. 3. Conduct a thorough audit of WordPress user roles and capabilities to ensure no excessive permissions are granted that could be exploited. 4. Implement Web Application Firewall (WAF) rules to detect and block suspicious requests targeting the plugin’s endpoints. 5. Use security plugins that provide enhanced access control and logging to detect unauthorized access attempts. 6. Regularly review and harden WordPress configurations, including disabling unused plugins and features to reduce the attack surface. 7. Educate site administrators about the risks of improper access control and encourage best practices in plugin management. 8. Consider isolating critical content behind additional authentication layers or VPN access where feasible. 9. Perform penetration testing focused on authorization controls to identify similar weaknesses proactively. 10. Maintain comprehensive backups and incident response plans to quickly recover if exploitation occurs.