CVE-2025-11615 identifies a SQL injection vulnerability in the SourceCodester Best Salon Management System version 1.0, located in the /panel/add_invoice.php script. The vulnerability arises from improper sanitization of the ServiceId parameter, which is used directly in SQL queries without adequate validation or parameterization. This flaw allows remote attackers to inject malicious SQL code by manipulating the ServiceId argument, enabling unauthorized access to or modification of the backend database. The vulnerability can be exploited remotely without any authentication or user interaction, increasing its risk profile. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and partial impacts on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). Although no confirmed exploits are reported in the wild, public proof-of-concept exploits exist, which could facilitate attacks. The affected product is typically used by small to medium-sized salon businesses for managing invoices and services, meaning that exploitation could lead to exposure or alteration of sensitive customer and business data. The lack of official patches at the time of reporting necessitates immediate mitigation efforts by users.

For European organizations, particularly small and medium enterprises (SMEs) in the salon and beauty industry using the affected software, this vulnerability poses a significant risk to data confidentiality and integrity. Exploitation could lead to unauthorized disclosure of customer information, financial data, and business records, potentially resulting in reputational damage and regulatory non-compliance under GDPR. Additionally, attackers could alter invoice data, impacting business operations and financial accuracy. The remote and unauthenticated nature of the exploit increases the likelihood of attacks, especially in environments with internet-facing management portals. While the availability impact is rated low to medium, disruption of invoicing processes could affect business continuity. The medium severity rating suggests a moderate but actionable threat that requires prompt attention to prevent data breaches and operational issues.

Since no official patches are currently available, European organizations should immediately implement the following mitigations: 1) Apply strict input validation on the ServiceId parameter, ensuring it only accepts expected numeric or predefined values. 2) Refactor the application code to use parameterized SQL queries or prepared statements to prevent injection. 3) Restrict network access to the /panel/add_invoice.php endpoint by implementing IP whitelisting or VPN access to limit exposure. 4) Monitor web application logs for suspicious SQL query patterns or anomalous input values targeting the ServiceId parameter. 5) Conduct regular security assessments and code reviews focusing on input handling and database interactions. 6) Educate developers and administrators about secure coding practices to prevent similar vulnerabilities. 7) Plan for an immediate update or patch deployment once the vendor releases a fix. 8) Consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting this endpoint.