CVE-2025-57423 identifies a SQL injection vulnerability in the MyClub 0.5 application, specifically within the /articles endpoint. The vulnerability arises from inadequate sanitization of several query parameters: Content, GroupName, PersonName, lastUpdate, pool, and title. An attacker can exploit this by sending a crafted GET request containing malicious SQL code embedded in these parameters. Because the vulnerability does not require authentication or user interaction, it can be exploited remotely by any attacker with network access to the affected endpoint. Successful exploitation could allow attackers to execute arbitrary SQL commands against the backend database, potentially leading to unauthorized disclosure of sensitive information or unauthorized modification of database contents. The vulnerability is classified under CWE-89, which corresponds to SQL injection flaws. The CVSS v3.1 base score is 6.5, reflecting a medium severity with network attack vector, low attack complexity, no privileges required, no user interaction, and impacts on confidentiality and integrity but not availability. No patches or known exploits have been reported yet, indicating that organizations should prioritize detection and mitigation to prevent future exploitation. The lack of affected version specifics suggests that all instances of MyClub 0.5 might be vulnerable unless mitigated.

For European organizations, the impact of this vulnerability can be significant, particularly for those using MyClub 0.5 to manage community, sports, or membership data. Exploitation could lead to unauthorized access to personal data, violating GDPR and other data protection regulations, potentially resulting in legal penalties and reputational damage. Data integrity could also be compromised, affecting the reliability of stored information and operational processes dependent on it. Since the vulnerability does not require authentication, attackers can exploit it remotely, increasing the risk of widespread attacks. Organizations with public-facing MyClub instances are especially vulnerable. The absence of known exploits currently reduces immediate risk but also means attackers could develop exploits without warning. The medium severity score suggests moderate urgency, but the potential for data breaches and manipulation warrants prompt action.

European organizations should implement the following specific mitigations: 1) Conduct a thorough code review of the /articles endpoint and all query parameter handling to identify and fix input sanitization issues. 2) Replace any dynamic SQL queries with parameterized queries or prepared statements to prevent injection. 3) Employ web application firewalls (WAFs) configured to detect and block SQL injection attempts targeting the affected parameters. 4) Monitor database logs and application logs for unusual query patterns or errors indicative of injection attempts. 5) Restrict network access to the MyClub application to trusted IP ranges where possible, reducing exposure. 6) If possible, isolate the database with least privilege principles to limit the impact of any successful injection. 7) Engage with the MyClub vendor or community to obtain or develop patches and apply them promptly once available. 8) Educate developers and administrators about secure coding practices to prevent similar vulnerabilities in future versions.