CVE-2025-13451 is a SQL injection vulnerability identified in SourceCodester Online Shop Project version 1.0. The vulnerability exists in an unspecified function within the /action.php file, where the Search parameter is improperly sanitized, allowing attackers to inject malicious SQL code. This injection can be performed remotely without authentication or user interaction, enabling attackers to manipulate backend database queries. Potential impacts include unauthorized data disclosure, data modification, or deletion, and possibly full compromise of the underlying database and application integrity. The vulnerability has a CVSS 4.0 score of 6.9, indicating a medium severity level, with low complexity and no required privileges or user interaction. Although no active exploitation has been reported, a public exploit is available, increasing the likelihood of future attacks. The vulnerability affects only version 1.0 of the product, which is an online shop platform commonly used by small to medium-sized e-commerce websites. The lack of official patches or mitigation guidance from the vendor necessitates immediate defensive measures by users. This vulnerability highlights the critical need for secure coding practices such as input validation and the use of parameterized queries to prevent SQL injection attacks.

For European organizations, especially those operating e-commerce platforms using SourceCodester Online Shop Project 1.0, this vulnerability poses a significant risk of data breaches involving customer information, payment details, and business data. Exploitation could lead to unauthorized access to sensitive databases, resulting in loss of confidentiality and integrity of data. Additionally, attackers might disrupt service availability by corrupting or deleting database records, impacting business operations and customer trust. Given the remote and unauthenticated nature of the exploit, attackers can launch attacks at scale, potentially affecting multiple organizations. Regulatory implications under GDPR are also critical, as data breaches could lead to substantial fines and reputational damage. The medium severity rating suggests that while the vulnerability is serious, the impact can be mitigated with proper controls. However, organizations relying on this software without timely remediation remain exposed to escalating threats, especially as public exploit code is accessible.

1. Immediately audit all instances of SourceCodester Online Shop Project 1.0 for the presence of the vulnerable /action.php file and the Search parameter. 2. Implement parameterized queries or prepared statements in the codebase to prevent SQL injection. 3. Apply strict input validation and sanitization on all user-supplied inputs, particularly the Search parameter. 4. Deploy Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting this vulnerability. 5. Monitor application logs for unusual query patterns or repeated failed attempts to exploit the Search parameter. 6. If possible, upgrade or migrate to a newer, patched version of the software or alternative e-commerce platforms with secure coding standards. 7. Conduct regular security assessments and code reviews focusing on injection flaws. 8. Educate development teams on secure coding practices to prevent recurrence. 9. Prepare incident response plans to quickly address any exploitation attempts. 10. Coordinate with vendors or community forums for any forthcoming patches or updates.