CVE-2025-58243 is a missing authorization vulnerability identified in the Jthemes imEvent plugin, a WordPress plugin used for event management. The flaw exists in versions up to and including 3.4.0 and allows unauthenticated remote attackers to access functionality that should be protected by Access Control Lists (ACLs). This means that certain functions or data within the plugin can be accessed without proper permission checks, potentially exposing sensitive information or enabling unauthorized actions. The vulnerability has a CVSS v3.1 base score of 5.3, reflecting a medium severity level. The vector indicates that the attack can be performed remotely over the network (AV:N), requires no privileges (PR:N), no user interaction (UI:N), and affects confidentiality only (C:L), with no impact on integrity or availability. No known exploits have been reported in the wild as of the publication date, and no patches have been released yet. The issue was reserved in late August 2025 and published in November 2025. The vulnerability arises from improper or missing authorization checks within the plugin's code, allowing attackers to bypass ACLs and access restricted functionality. This could lead to unauthorized data disclosure or limited unauthorized actions within the affected WordPress site. Since the plugin is commonly used in event management contexts, sensitive event-related data could be exposed.

For European organizations, the impact primarily involves unauthorized access to event management functionality and potentially sensitive event data. This could lead to information disclosure, such as event details, attendee information, or internal scheduling data, which may have privacy or competitive implications. Although the vulnerability does not allow modification or deletion of data (no integrity impact) or disruption of service (no availability impact), the confidentiality loss could be significant depending on the sensitivity of the data managed by imEvent. Organizations relying on imEvent for critical event coordination or handling personal data under GDPR may face compliance risks if unauthorized data access occurs. The ease of exploitation (no authentication or user interaction required) increases the risk of opportunistic attacks, especially if the plugin is publicly accessible. The lack of known exploits in the wild reduces immediate risk but does not eliminate the threat, especially once exploit code becomes available. Attackers could leverage this vulnerability to gather intelligence or prepare for further attacks.

1. Immediately restrict access to the imEvent plugin functionality by implementing network-level controls such as IP whitelisting or VPN access to the WordPress admin area. 2. Use Web Application Firewalls (WAFs) to detect and block suspicious requests targeting imEvent endpoints. 3. Monitor web server and application logs for unusual access patterns or repeated attempts to access restricted functions. 4. Disable or deactivate the imEvent plugin if it is not essential or if no immediate patch is available. 5. Regularly check for updates from Jthemes and apply patches promptly once released. 6. Conduct a thorough review of user roles and permissions in WordPress to ensure least privilege principles are enforced. 7. Consider implementing additional authentication or multi-factor authentication for administrative access to reduce risk. 8. Educate relevant staff about the vulnerability and encourage vigilance for phishing or social engineering attempts that could leverage this weakness. 9. Prepare incident response plans to quickly address any detected exploitation attempts. 10. For organizations handling personal data, review GDPR compliance measures related to data breach notification in case of unauthorized access.