CVE-2025-15439 is a SQL injection vulnerability identified in Daptin version 0.10.3, specifically within the Aggregate API component's goqu.L function located in the server/resource/resource_aggregate.go source file. The vulnerability stems from inadequate sanitization and validation of user-supplied arguments—namely column, group, and order parameters—that are directly incorporated into SQL queries. This improper handling allows an attacker to craft malicious input that alters the intended SQL command structure, potentially leading to unauthorized data access, data modification, or other database manipulation. The vulnerability is remotely exploitable without requiring authentication or user interaction, increasing its risk profile. Although the CVSS 4.0 base score is 5.3 (medium severity), the exploit code is publicly available, which could facilitate exploitation by less skilled attackers. The vendor has not issued a patch or responded to disclosure attempts, leaving users exposed. The vulnerability affects only version 0.10.3 of Daptin, an open-source backend framework used for building APIs and managing data aggregation. The lack of a patch necessitates that organizations implement compensating controls to mitigate risk. The vulnerability's impact is primarily on confidentiality and integrity of data, with a lesser effect on availability. The exploitability is high due to network accessibility and no authentication requirements, but the scope is limited to systems running the specific vulnerable version of Daptin.

For European organizations, this vulnerability poses a significant risk to the confidentiality and integrity of data managed through Daptin's Aggregate API. Exploitation could lead to unauthorized data disclosure, data tampering, or injection of malicious data, potentially compromising business operations and customer trust. Organizations relying on Daptin for backend API services, especially those handling sensitive or regulated data (e.g., personal data under GDPR), face compliance risks and potential legal consequences if data breaches occur. The vulnerability's remote exploitability without authentication increases the attack surface, particularly for internet-facing services. Additionally, the absence of vendor response and patches prolongs exposure, increasing the window for attackers to exploit the flaw. This could also lead to reputational damage and financial losses due to incident response and remediation costs. The medium severity rating suggests that while the impact is serious, it may not result in full system compromise or widespread disruption unless combined with other vulnerabilities or misconfigurations.

Given the lack of an official patch from the vendor, European organizations should implement the following specific mitigations: 1) Restrict network access to the Aggregate API endpoints by using firewalls, VPNs, or IP whitelisting to limit exposure to trusted users and systems only. 2) Implement strict input validation and sanitization at the application layer to ensure that column, group, and order parameters conform to expected formats and values, rejecting any suspicious or malformed input. 3) Employ Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection patterns targeting the vulnerable parameters. 4) Monitor logs and database query patterns for anomalies indicative of injection attempts, enabling early detection and response. 5) Consider upgrading or migrating away from Daptin 0.10.3 if possible, or applying custom patches to sanitize inputs in the vulnerable function. 6) Conduct security assessments and penetration tests focusing on API endpoints to identify and remediate injection risks. 7) Educate developers and administrators about secure coding practices and the importance of sanitizing user inputs in API parameters. These measures collectively reduce the risk until an official patch or updated version is released.