CVE-2025-39353 is a Missing Authorization vulnerability (CWE-862) found in the ThemeGoods Grand Restaurant WordPress plugin, affecting versions up to 7.0. This vulnerability arises from improperly configured access control mechanisms, allowing unauthorized users to perform actions or access functionality that should be restricted. Specifically, the flaw enables exploitation without requiring any authentication or user interaction, as indicated by the CVSS vector (AV:N/AC:L/PR:N/UI:N). Although the vulnerability does not impact confidentiality or availability, it compromises integrity by allowing unauthorized modification or manipulation of data or settings within the plugin. The vulnerability is remotely exploitable over the network with low attack complexity, making it accessible to attackers without special privileges. No known public exploits or patches are currently available, but the issue has been officially published and recognized by CVE and CISA. Given the plugin’s role in managing restaurant-related content and potentially sensitive operational data, unauthorized changes could disrupt business processes or misrepresent information on affected websites.

For European organizations, especially those in the hospitality and restaurant sectors using WordPress with the Grand Restaurant plugin, this vulnerability poses a moderate risk. Unauthorized modifications could lead to misinformation on menus, pricing, or booking systems, potentially damaging customer trust and business reputation. While the vulnerability does not directly expose sensitive data, integrity breaches could facilitate further attacks or fraud. Additionally, compromised websites may face regulatory scrutiny under GDPR if customer-facing data or services are indirectly affected. The medium severity rating reflects the balance between the ease of exploitation and the limited scope of impact, but organizations relying heavily on this plugin for critical operations should consider the threat significant enough to warrant prompt attention.

Given the absence of an official patch, European organizations should implement compensating controls immediately. These include restricting access to the WordPress admin and plugin management interfaces via IP whitelisting or VPNs, enforcing strict role-based access controls to limit who can modify plugin settings, and monitoring logs for unusual activity related to the Grand Restaurant plugin. Organizations should also consider temporarily disabling the plugin if feasible until a patch is released. Regular backups of website data and configurations should be maintained to enable quick restoration in case of unauthorized changes. Additionally, applying Web Application Firewall (WAF) rules to detect and block suspicious requests targeting the plugin’s endpoints can reduce exposure. Finally, organizations should stay alert for vendor updates or security advisories to apply patches promptly once available.