CVE-2025-10109 is a SQL Injection vulnerability identified in version 1.0 of the Campcodes Online Loan Management System. The vulnerability exists in the processing of the /ajax.php endpoint when the action parameter is set to 'delete_payment'. Specifically, the manipulation of the 'ID' argument in this request allows an attacker to inject malicious SQL code. This injection flaw can be exploited remotely without any authentication or user interaction, as indicated by the CVSS vector (AV:N/AC:L/AT:N/PR:N/UI:N). The vulnerability impacts the confidentiality, integrity, and availability of the backend database, albeit with limited scope and impact (VC:L/VI:L/VA:L). The system likely uses the 'ID' parameter to identify payment records for deletion, and improper sanitization or parameterization of this input leads to the injection risk. Although the CVSS score is 6.9 (medium severity), the exploitability is relatively straightforward due to no required privileges or user interaction. The vulnerability has been publicly disclosed, but there are no known exploits in the wild at this time. No official patches have been linked, which suggests that affected organizations must implement mitigations proactively. Given the nature of the system—a loan management platform—successful exploitation could allow attackers to manipulate financial records, extract sensitive customer data, or disrupt payment processing, potentially leading to financial fraud or operational disruptions.

For European organizations using the Campcodes Online Loan Management System, this vulnerability poses a significant risk to financial data integrity and confidentiality. Loan management systems handle sensitive personal and financial information, including customer identities, loan amounts, payment schedules, and transaction histories. Exploitation could lead to unauthorized data disclosure, alteration or deletion of payment records, and disruption of loan servicing operations. This could result in financial losses, regulatory non-compliance (e.g., GDPR violations due to data breaches), reputational damage, and legal liabilities. The ability to remotely exploit the vulnerability without authentication increases the attack surface, especially for organizations exposing the system to the internet. Given the medium severity, the impact is serious but may be contained if compensating controls are in place. However, the financial sector's criticality in Europe means even medium-severity vulnerabilities in loan management systems warrant prompt attention.

1. Immediate input validation and sanitization: Implement strict validation on the 'ID' parameter in /ajax.php?action=delete_payment to ensure only expected numeric or UUID formats are accepted. 2. Use parameterized queries or prepared statements in all database interactions to eliminate SQL injection risks. 3. Restrict access to the vulnerable endpoint by implementing network-level controls such as IP whitelisting or VPN access, limiting exposure to trusted users only. 4. Employ Web Application Firewalls (WAFs) with updated rules to detect and block SQL injection attempts targeting this endpoint. 5. Conduct thorough code reviews and security testing (including automated static and dynamic analysis) on the loan management system to identify and remediate similar injection flaws. 6. Monitor logs for suspicious activities related to the 'delete_payment' action, such as unusual parameter values or repeated failed requests. 7. Engage with the vendor (Campcodes) for official patches or updates and apply them promptly once available. 8. If patching is delayed, consider isolating the affected system from public internet access and enforce multi-factor authentication for administrative interfaces to reduce risk.