CVE-2025-64259 identifies a missing authorization vulnerability in the Theater for WordPress plugin, versions up to 0.18.8. The vulnerability stems from incorrectly configured access control security levels, allowing remote attackers to bypass authorization checks. This means that attackers can perform unauthorized actions or access restricted functionality or data within the plugin without needing any privileges or user interaction. The CVSS v3.1 base score is 6.5, reflecting a medium severity level, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), and limited confidentiality and integrity impacts (C:L, I:L), with no impact on availability (A:N). The plugin is used within WordPress environments, which are widely deployed for content management, including cultural and entertainment websites that may use this plugin to manage theater-related content. Although no known exploits are currently reported in the wild, the vulnerability presents a risk of unauthorized data disclosure or modification, potentially undermining trust and data integrity on affected sites. The lack of authentication requirement and ease of exploitation increase the urgency for patching and mitigation. The absence of a patch link suggests that a fix may not yet be publicly available, so organizations should monitor vendor communications closely. The vulnerability was reserved on 2025-10-29 and published on 2025-11-13, indicating recent disclosure.

For European organizations, this vulnerability poses a risk primarily to websites using the Theater for WordPress plugin, especially those in the cultural, entertainment, and event management sectors. Unauthorized access could lead to exposure or alteration of sensitive event or user data, damaging organizational reputation and user trust. While the impact on availability is none, the confidentiality and integrity impacts could facilitate further attacks or data leaks. Given the plugin’s integration with WordPress, a widely used CMS in Europe, the attack surface is significant. Organizations relying on this plugin for ticketing, event scheduling, or content management may face operational disruptions or compliance issues if unauthorized changes occur. Additionally, GDPR considerations require protecting personal data, so unauthorized access could lead to regulatory penalties. The medium severity rating suggests a moderate but actionable threat level, warranting prompt attention to prevent exploitation.

1. Monitor the official Jeroen Schmit and WordPress plugin repositories for patches addressing CVE-2025-64259 and apply updates immediately upon release. 2. Until a patch is available, restrict access to the plugin’s administrative and sensitive endpoints using web application firewalls (WAFs) or IP whitelisting to limit exposure. 3. Conduct a thorough review of the plugin’s access control configurations to identify and correct any misconfigurations. 4. Implement strict role-based access controls (RBAC) within WordPress to minimize privileges granted to users interacting with the plugin. 5. Enable detailed logging and monitoring of plugin-related activities to detect anomalous or unauthorized access attempts promptly. 6. Educate site administrators about the vulnerability and the importance of timely updates and access control hygiene. 7. Consider temporary disabling the plugin if it is not critical to operations until a secure version is available. 8. Use security plugins or services that can detect and block exploitation attempts targeting this vulnerability.