CVE-2025-28939 identifies a Blind SQL Injection vulnerability in the EuroCizia WP Google Calendar Manager WordPress plugin, specifically affecting versions up to and including 2.1. The vulnerability arises from improper neutralization of special characters in SQL commands, allowing attackers to inject arbitrary SQL statements into the backend database. Blind SQL Injection means that attackers can infer data by observing application behavior or response times, even if direct data output is not visible. This type of injection can be exploited to extract sensitive information, modify database contents, or escalate privileges within the application. The plugin is used to integrate Google Calendar functionality into WordPress sites, and the vulnerability could be exploited remotely by unauthenticated attackers if the plugin is publicly accessible. No CVSS score has been assigned yet, and no patches or known exploits are currently reported. The vulnerability was published on March 26, 2025, with the issue reserved on March 11, 2025. The lack of a patch increases the urgency for organizations to implement interim mitigations or disable the plugin until a fix is available.

The potential impact of this vulnerability is significant for organizations using the EuroCizia WP Google Calendar Manager plugin. Successful exploitation could lead to unauthorized disclosure of sensitive data stored in the WordPress database, including user information, credentials, or other confidential content. Attackers might also manipulate or delete data, impacting data integrity and availability. Given WordPress's widespread use globally, many websites could be affected, especially those relying on this specific plugin for calendar management. The vulnerability could be leveraged as a foothold for further attacks within the network, including privilege escalation or lateral movement. The absence of authentication requirements and user interaction lowers the barrier for exploitation, increasing the risk. Organizations in sectors with high-value data or regulatory requirements (e.g., finance, healthcare, government) face elevated risks of reputational damage, compliance violations, and operational disruption.

To mitigate this vulnerability, organizations should immediately assess their use of the EuroCizia WP Google Calendar Manager plugin and identify affected versions (up to 2.1). Until an official patch is released, consider disabling or uninstalling the plugin to eliminate the attack surface. Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the plugin's endpoints. Review and restrict database user permissions to minimize potential damage from injection attacks. Monitor web server and application logs for suspicious activity indicative of SQL injection attempts. If disabling the plugin is not feasible, isolate the affected WordPress instance behind network controls and limit access to trusted users only. Engage with the vendor or community for updates and patches, and plan for prompt application once available. Additionally, conduct security code reviews and penetration testing focused on SQL injection vectors in custom or third-party plugins. Educate development teams on secure coding practices to prevent similar vulnerabilities in future plugins.