CVE-2025-9085 is a medium-severity SQL Injection vulnerability identified in the User Registration & Membership plugin by wpeverest for WordPress. This plugin provides functionalities such as custom registration form building, custom login forms, user profiles, content restriction, and membership management. The vulnerability arises from improper neutralization of special elements used in SQL commands (CWE-89), specifically through the 's' parameter. The root cause is insufficient escaping of user-supplied input and inadequate preparation of SQL queries, allowing an authenticated attacker with administrator-level privileges or higher to inject additional SQL commands into existing queries. This injection can be exploited to extract sensitive information from the underlying database. The vulnerability affects all versions of the plugin as indicated, and no patches have been published at the time of disclosure. The CVSS 3.1 base score is 4.9, reflecting a medium severity with network attack vector, low attack complexity, high privileges required, no user interaction, unchanged scope, high confidentiality impact, and no impact on integrity or availability. No known exploits are reported in the wild yet. Given the requirement for administrator-level access, exploitation is limited to insiders or attackers who have already compromised an administrative account, but the impact on confidentiality is significant as sensitive data can be extracted without detection or alteration of data integrity or service availability.

For European organizations, this vulnerability poses a risk primarily to websites and services using the affected WordPress plugin for user registration and membership management. Since WordPress is widely used across Europe for various sectors including e-commerce, education, government, and media, the potential for sensitive data exposure is considerable. Attackers with administrative access could leverage this flaw to extract confidential user data, membership details, or other sensitive database contents, potentially violating data protection regulations such as GDPR. This could lead to legal penalties, reputational damage, and loss of user trust. The requirement for high privileges reduces the risk of external attackers exploiting this vulnerability directly, but insider threats or attackers who have escalated privileges could cause significant damage. Additionally, the lack of impact on integrity and availability means the attack might remain stealthy, complicating detection and response efforts.

European organizations should immediately audit their WordPress installations to identify the presence of the wpeverest User Registration & Membership plugin. Since no official patches are available yet, organizations should consider the following mitigations: 1) Restrict administrative access strictly using multi-factor authentication and strong password policies to reduce the risk of privilege escalation or insider misuse. 2) Implement Web Application Firewalls (WAFs) with custom rules to detect and block suspicious SQL injection patterns targeting the 's' parameter in plugin requests. 3) Monitor database query logs and application logs for unusual query patterns or data access anomalies that could indicate exploitation attempts. 4) Temporarily disable or replace the vulnerable plugin with alternative solutions until a patch is released. 5) Apply the principle of least privilege to database accounts used by the plugin, limiting their ability to execute multiple queries or access sensitive tables. 6) Keep WordPress core and all plugins updated and subscribe to vendor security advisories for timely patching once available.