CVE-2025-10003 is a medium-severity SQL Injection vulnerability (CWE-89) affecting the UsersWP plugin for WordPress, specifically versions up to and including 1.2.44. This plugin provides front-end login, user registration, user profile management, and members directory functionalities. The vulnerability arises from insufficient sanitization and escaping of user-supplied input in the 'upload_file_remove' function, particularly the 'htmlvar' parameter. Due to improper neutralization of special elements in SQL commands, an unauthenticated attacker can perform a time-based SQL Injection attack by appending malicious SQL queries to existing database queries. This allows the attacker to extract sensitive information from the backend database without requiring authentication or user interaction. The vulnerability does not impact data integrity or availability directly but poses a significant confidentiality risk by potentially exposing sensitive user data stored in the database. The CVSS 3.1 base score is 6.5, reflecting a network attack vector with low attack complexity, requiring low privileges but no user interaction, and resulting in high confidentiality impact. No known exploits are currently reported in the wild, and no official patches have been linked yet. The vulnerability is critical for websites using this plugin, especially those handling sensitive user information, as it could lead to data breaches and privacy violations.

For European organizations, this vulnerability poses a substantial risk to the confidentiality of user data managed through WordPress sites using the affected UsersWP plugin. Given the GDPR regulations in Europe, unauthorized disclosure of personal data could lead to severe legal and financial penalties. Organizations relying on this plugin for user management, membership directories, or front-end login features may face data breaches exposing personally identifiable information (PII), user credentials, or other sensitive data. This can damage organizational reputation, erode customer trust, and result in compliance violations. Additionally, the vulnerability could be leveraged as a foothold for further attacks if attackers gain insights into database structure or user accounts. The fact that exploitation requires no user interaction and can be performed remotely over the network increases the urgency for European entities to address this issue promptly.

1. Immediate upgrade: Organizations should update the UsersWP plugin to a version that addresses this vulnerability once an official patch is released by the vendor. Until then, consider disabling the plugin or the vulnerable features if feasible. 2. Web Application Firewall (WAF): Deploy and configure a WAF with rules specifically designed to detect and block SQL Injection attempts targeting the 'upload_file_remove' function and 'htmlvar' parameter. 3. Input validation and sanitization: Implement additional server-side input validation and sanitization for all user inputs related to file uploads and user profile management, especially if custom code interacts with the plugin. 4. Database permissions: Restrict database user permissions to the minimum necessary, preventing the execution of multiple queries or access to sensitive tables where possible. 5. Monitoring and logging: Enable detailed logging of web requests and database queries to detect anomalous activities indicative of SQL Injection attempts. 6. Incident response readiness: Prepare to respond to potential data breaches by having a clear incident response plan aligned with GDPR notification requirements. 7. Alternative plugins: Evaluate alternative WordPress plugins with better security track records for user management if patching is delayed.