CVE-2025-9759 is a security vulnerability identified in version 1.0 of the Campcodes Courier Management System, specifically within the Signup function of the /ajax.php file. The vulnerability arises from improper handling of the 'lastname' parameter, which allows an attacker to perform SQL injection attacks. SQL injection is a critical web application security flaw where malicious SQL code is inserted into input fields, enabling unauthorized access or manipulation of the backend database. In this case, the injection can be performed remotely without any authentication or user interaction, increasing the risk of exploitation. The vulnerability has a CVSS 4.0 base score of 6.9, indicating a medium severity level. The vector details show that the attack requires no privileges, no user interaction, and can be executed over the network with low attack complexity. The impact on confidentiality, integrity, and availability is limited but present, as indicated by the low to medium impact ratings in the CVSS vector. Although no public exploit is currently known to be actively used in the wild, the exploit code has been publicly released, raising the likelihood of future exploitation. The lack of available patches or mitigations from the vendor further exacerbates the risk. This vulnerability could allow attackers to extract sensitive data, modify database contents, or disrupt service operations within the affected system, potentially compromising the courier management workflows and associated customer data.

For European organizations using Campcodes Courier Management System 1.0, this vulnerability poses a tangible risk to operational security and data protection compliance. Courier management systems typically handle sensitive shipment data, customer information, and logistical details, which if exposed or altered, could lead to financial losses, reputational damage, and regulatory penalties under GDPR. The ability to remotely exploit this vulnerability without authentication means attackers could target these systems from anywhere, potentially leading to unauthorized data disclosure or manipulation of shipment records. Disruption of courier operations could affect supply chains and customer service, particularly for logistics companies operating across European borders. Additionally, compromised systems could be leveraged as pivot points for further network intrusion, increasing the overall threat landscape for affected organizations. Given the medium severity, the impact is significant but may be contained if proper network segmentation and monitoring are in place.

To mitigate this vulnerability, European organizations should immediately audit their use of Campcodes Courier Management System version 1.0 and assess exposure of the /ajax.php Signup function. Specific recommendations include: 1) Implement input validation and parameterized queries or prepared statements to prevent SQL injection in the 'lastname' parameter and all user inputs. 2) Employ Web Application Firewalls (WAFs) configured to detect and block SQL injection patterns targeting the vulnerable endpoint. 3) Restrict network access to the Courier Management System to trusted internal networks or VPNs, minimizing exposure to external attackers. 4) Monitor logs for unusual database queries or repeated failed signup attempts that may indicate exploitation attempts. 5) Engage with the vendor or development team to obtain patches or updates; if unavailable, consider upgrading to a more secure system or applying custom code fixes. 6) Conduct regular security assessments and penetration tests focusing on web application vulnerabilities. 7) Ensure backups of critical data are maintained and tested for recovery to mitigate potential data loss or corruption.