CVE-2026-3753 identifies a SQL injection vulnerability in the SourceCodester Sales and Inventory System version 1.0. The vulnerability resides in an unspecified function within the /add_sales_print.php file, where the sid parameter is improperly sanitized, allowing attackers to inject malicious SQL code. This injection flaw can be exploited remotely without requiring user interaction or elevated privileges, making it accessible to low-privilege attackers. The injection can lead to unauthorized reading, modification, or deletion of database records, potentially compromising sensitive sales and inventory data. The vulnerability has been publicly disclosed, increasing the risk of exploitation, although no active exploitation has been reported to date. The CVSS 4.0 base score is 5.3 (medium), reflecting the moderate impact on confidentiality, integrity, and availability, combined with ease of exploitation and lack of authentication requirements. The vulnerability affects only version 1.0 of the product, which is a niche sales and inventory management system commonly used by small to medium enterprises. No official patches have been linked yet, so mitigation relies on secure coding practices and configuration hardening.

The SQL injection vulnerability allows attackers to execute arbitrary SQL commands on the backend database, which can lead to unauthorized disclosure of sensitive sales and inventory data, data tampering, or deletion. This can disrupt business operations, cause financial losses, and damage organizational reputation. Since the vulnerability requires no authentication and can be exploited remotely, it poses a significant risk to any exposed instances of the system. Attackers could leverage this flaw to gain further access within the network or pivot to other systems. The impact is particularly severe for organizations relying heavily on accurate sales and inventory data for operational and financial decision-making. However, the scope is limited to the affected version 1.0 of the SourceCodester product, which reduces the overall global impact. The absence of known active exploitation reduces immediate risk but the public disclosure increases the likelihood of future attacks.

Organizations should immediately audit their use of SourceCodester Sales and Inventory System version 1.0 and isolate or restrict access to vulnerable instances. Since no official patch is currently available, implement the following mitigations: 1) Apply strict input validation and sanitization on the sid parameter and all user inputs to prevent injection of malicious SQL code. 2) Refactor the vulnerable code to use parameterized queries or prepared statements to eliminate direct concatenation of user input into SQL commands. 3) Restrict database user permissions to the minimum necessary, preventing unauthorized data modification or extraction. 4) Employ web application firewalls (WAFs) with SQL injection detection rules to block exploit attempts. 5) Monitor logs for suspicious database queries or access patterns indicative of exploitation attempts. 6) Plan for an upgrade or migration to a patched or alternative system version as soon as a fix becomes available. 7) Educate developers and administrators on secure coding and configuration best practices to prevent similar vulnerabilities.