CVE-2025-13561 identifies a SQL injection vulnerability in SourceCodester Company Website CMS version 1.0, located in the /admin/index.php file. The vulnerability arises from improper sanitization of the 'Username' parameter, allowing an attacker to inject malicious SQL code remotely without authentication or user interaction. This flaw enables attackers to manipulate backend SQL queries, potentially leading to unauthorized data disclosure, data modification, or even full database compromise depending on the underlying database privileges. The vulnerability has a CVSS 4.0 score of 6.9, reflecting medium severity with network attack vector, low complexity, no privileges or user interaction required, and limited impact on confidentiality, integrity, and availability. Although no known exploits are currently active in the wild, the public disclosure of exploit code increases the likelihood of exploitation attempts. The affected product is a niche CMS, often used by small and medium enterprises for company websites, which may lack robust security controls. The absence of official patches at the time of disclosure necessitates immediate mitigation efforts to reduce risk. The vulnerability's exploitation could lead to data breaches, defacement, or further system compromise if leveraged as an initial access vector.

For European organizations, this vulnerability poses a risk primarily to small and medium enterprises using SourceCodester Company Website CMS version 1.0. Exploitation could lead to unauthorized access to sensitive company data stored in the CMS database, including user credentials, business information, or customer data, potentially violating GDPR requirements. Data integrity could be compromised, affecting the reliability of website content and backend systems. Availability impact is limited but possible if attackers execute destructive SQL commands. The risk is heightened in sectors with sensitive data or regulatory oversight, such as finance, healthcare, or government services. The public disclosure of exploit code increases the likelihood of opportunistic attacks, especially against organizations with limited cybersecurity resources. The vulnerability could also be leveraged as a foothold for further lateral movement or ransomware deployment. Overall, the impact on European organizations depends on the prevalence of the affected CMS and the sensitivity of the data managed through it.

1. Immediately audit all instances of SourceCodester Company Website CMS version 1.0 within the organization to identify affected systems. 2. Apply any official patches or updates from SourceCodester as soon as they become available. 3. In the absence of patches, implement web application firewalls (WAFs) with rules specifically designed to detect and block SQL injection attempts targeting the 'Username' parameter in /admin/index.php. 4. Conduct input validation and sanitization on all user-supplied data, especially the 'Username' field, to prevent injection of malicious SQL code. 5. Restrict database user privileges to the minimum necessary to limit the impact of a successful injection attack. 6. Monitor logs for unusual database queries or failed login attempts that may indicate exploitation attempts. 7. Educate web administrators and developers about secure coding practices and the risks of SQL injection. 8. Consider migrating to more secure and actively maintained CMS platforms if feasible. 9. Regularly back up CMS data and test restoration procedures to minimize downtime and data loss in case of compromise.