CVE-2025-7888 is a SQL Injection vulnerability identified in the TDuckCloud tduck-platform version 5.1. The vulnerability resides in the UserFormDataMapper function within the source file src/main/java/com/tduck/cloud/form/mapper/UserFormDataMapper.java. Specifically, the issue arises from improper handling and sanitization of the 'formKey' argument, which allows an attacker to inject malicious SQL code. This injection flaw can be exploited remotely without requiring user interaction or authentication, making it a significant risk. The vulnerability has been publicly disclosed, and although no known exploits are currently observed in the wild, the availability of the exploit code increases the likelihood of future attacks. The vendor has been contacted but has not responded or issued a patch, leaving the vulnerability unmitigated. The CVSS 4.0 score is 5.3, indicating a medium severity level, reflecting the ease of remote exploitation but limited impact on confidentiality, integrity, and availability due to partial scope and privileges required (low privileges). The vulnerability could allow attackers to manipulate database queries, potentially leading to unauthorized data access, data modification, or disruption of service depending on the underlying database and application logic. Given the critical nature of SQL injection vulnerabilities in general, this issue warrants prompt attention despite the medium CVSS score, especially in environments where sensitive data is processed or stored.

For European organizations using TDuckCloud tduck-platform 5.1, this vulnerability poses a tangible risk of unauthorized data access or manipulation. SQL injection can lead to leakage of sensitive personal data, intellectual property, or business-critical information, which could violate GDPR and other data protection regulations, resulting in legal and financial repercussions. The ability to exploit this remotely without authentication increases the attack surface, potentially allowing threat actors to compromise systems from outside the network perimeter. This could lead to operational disruptions, reputational damage, and loss of customer trust. Organizations in sectors such as finance, healthcare, government, and critical infrastructure, which often handle sensitive data, are particularly vulnerable. The lack of vendor response and patch availability exacerbates the risk, requiring organizations to implement compensating controls. Additionally, the medium severity rating might lead some organizations to underestimate the threat, but the nature of SQL injection vulnerabilities means even medium-rated issues can have severe consequences if exploited effectively.

Since no official patch is available from the vendor, European organizations should implement immediate compensating controls. These include: 1) Applying Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection patterns targeting the 'formKey' parameter. 2) Conducting thorough input validation and sanitization at the application level, especially for all user-supplied inputs, to neutralize malicious payloads. 3) Employing parameterized queries or prepared statements in the codebase to prevent injection vectors, if source code access and modification is possible. 4) Restricting database user privileges to the minimum necessary to limit the impact of any successful injection. 5) Monitoring database logs and application logs for unusual query patterns or errors indicative of injection attempts. 6) Isolating and segmenting affected systems to reduce lateral movement risks. 7) Preparing incident response plans specific to SQL injection exploitation scenarios. Organizations should also actively engage with TDuckCloud for updates and consider upgrading to newer, patched versions once available. Regular security assessments and penetration testing focusing on injection flaws are recommended to detect similar vulnerabilities proactively.