CVE-2025-11553 is a SQL injection vulnerability identified in version 1.0 of the code-projects Courier Management System, specifically in the /add-courier.php endpoint. The vulnerability arises from improper sanitization of the 'Shippername' parameter, which allows an attacker to inject malicious SQL code remotely without requiring authentication or user interaction. This flaw can be exploited to manipulate backend database queries, potentially enabling unauthorized data retrieval, modification, or deletion. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity, with an attack vector of network (remote), low attack complexity, no privileges required, and no user interaction needed. The scope and impact are limited to the confidentiality, integrity, and availability of the affected system, with low impact on each. Although no known exploits are currently active in the wild, public availability of exploit code increases the risk of exploitation. The vulnerability affects only version 1.0 of the Courier Management System, which is used in logistics and courier management contexts. The absence of official patches necessitates immediate mitigation efforts by affected organizations to prevent exploitation.

The SQL injection vulnerability in the Courier Management System can lead to unauthorized access to sensitive courier and shipment data, potentially exposing customer information and operational details. Attackers could manipulate or delete data, disrupting courier operations and causing service outages. For European organizations, especially those in the logistics and transportation sectors, this could result in significant operational disruptions, reputational damage, and regulatory non-compliance, particularly under GDPR due to potential data breaches. The remote and unauthenticated nature of the exploit increases the risk of widespread attacks if the software is exposed to the internet. The medium severity indicates a moderate but tangible risk, with potential for escalation if combined with other vulnerabilities or misconfigurations. The lack of known active exploits currently reduces immediate risk but does not eliminate it, especially given the public availability of exploit code.

1. Implement immediate input validation and sanitization on the 'Shippername' parameter to prevent injection of malicious SQL code. 2. Refactor the affected code to use parameterized queries or prepared statements to eliminate SQL injection risks. 3. Restrict external access to the /add-courier.php endpoint via network segmentation or firewall rules, limiting exposure to trusted networks only. 4. Monitor logs for unusual database query patterns or repeated access attempts to the vulnerable endpoint. 5. If possible, upgrade to a patched version once available or apply vendor-provided fixes promptly. 6. Conduct a security audit of the entire application to identify and remediate similar injection flaws. 7. Educate development teams on secure coding practices to prevent recurrence. 8. Employ Web Application Firewalls (WAFs) with rules targeting SQL injection attempts as an interim protective measure. 9. Regularly back up data to enable recovery in case of data tampering or loss.