CVE-2025-6879 is a SQL Injection vulnerability identified in version 1.0 of the SourceCodester Best Salon Management System, specifically affecting the /panel/add-tax.php file. The vulnerability arises from improper handling and sanitization of the 'Name' parameter, which allows an attacker to inject malicious SQL code remotely without requiring authentication or user interaction. This flaw enables an attacker to manipulate backend database queries, potentially leading to unauthorized data access, data modification, or deletion. The vulnerability has been publicly disclosed, increasing the risk of exploitation, although no known exploits are currently reported in the wild. The CVSS 4.0 base score is 5.3 (medium severity), reflecting the network attack vector, low attack complexity, no privileges or user interaction required, but limited impact on confidentiality, integrity, and availability. The vulnerability scope is limited to the affected component without privilege escalation or broader system compromise. Given the nature of SQL Injection, successful exploitation could allow attackers to extract sensitive customer or business data, disrupt salon management operations, or pivot to further attacks within the network.

For European organizations using the SourceCodester Best Salon Management System 1.0, this vulnerability poses a tangible risk to the confidentiality and integrity of their business and customer data. Salons and related service providers could face data breaches exposing personal customer information, financial details, or business-sensitive data. This could lead to regulatory non-compliance issues under GDPR, reputational damage, and potential financial penalties. Operational disruption is also possible if attackers modify or delete critical data, impacting appointment scheduling, billing, or tax calculations. Since the vulnerability can be exploited remotely without authentication, attackers can launch attacks over the internet, increasing the attack surface. European organizations with limited cybersecurity resources or lacking timely patching processes are particularly vulnerable. However, the medium severity score and lack of known active exploitation suggest the threat is moderate but should be addressed promptly to prevent escalation.

To mitigate this vulnerability, European organizations should first verify if they are running SourceCodester Best Salon Management System version 1.0 and specifically use the /panel/add-tax.php functionality. Immediate steps include: 1) Implement input validation and parameterized queries or prepared statements to sanitize the 'Name' parameter and prevent SQL injection. 2) If available, apply official patches or updates from the vendor; if no patches exist, consider disabling or restricting access to the vulnerable endpoint until a fix is available. 3) Employ Web Application Firewalls (WAFs) with rules targeting SQL injection patterns to provide an additional layer of defense. 4) Conduct regular security audits and code reviews focusing on input handling. 5) Monitor logs for suspicious database query patterns or unusual access to the add-tax.php endpoint. 6) Restrict network access to the management panel to trusted IP addresses or VPNs to reduce exposure. 7) Educate staff on the importance of timely updates and monitoring. These targeted measures go beyond generic advice by focusing on the specific vulnerable component and practical compensating controls.