CVE-2025-6753 is a SQL Injection vulnerability identified in the huija bicycleSharingServer version 1.0, specifically within the selectAdminByNameLike function of the AdminController.java file. This vulnerability arises due to improper sanitization or validation of user-supplied input that is directly incorporated into SQL queries. An attacker can exploit this flaw remotely without authentication or user interaction, by crafting malicious input that manipulates the SQL query logic. This can lead to unauthorized access to the backend database, allowing attackers to read, modify, or delete sensitive data, potentially escalate privileges, or disrupt service availability. The vulnerability has been publicly disclosed, although no known exploits are currently observed in the wild. The CVSS 4.0 base score is 5.3, reflecting a medium severity level, with network attack vector, low attack complexity, no privileges required, no user interaction, and limited impact on confidentiality, integrity, and availability. The vulnerability affects only version 1.0 of the product, which is a server application used for managing bicycle sharing services.

For European organizations operating or relying on the huija bicycleSharingServer 1.0, this vulnerability poses a tangible risk to the confidentiality and integrity of their operational data. Exploitation could lead to unauthorized disclosure of administrative credentials or user data, manipulation of system configurations, or disruption of bicycle sharing services. This could result in operational downtime, loss of customer trust, regulatory non-compliance (especially under GDPR due to potential personal data exposure), and financial losses. Given the critical role of bicycle sharing in urban mobility and smart city infrastructure in Europe, such disruptions could have cascading effects on public transportation systems and urban planning initiatives. Additionally, attackers could leverage this vulnerability as a foothold for further lateral movement within organizational networks.

To mitigate this vulnerability, organizations should immediately upgrade to a patched version of huija bicycleSharingServer once available. In the absence of an official patch, applying input validation and parameterized queries or prepared statements in the selectAdminByNameLike function is critical to prevent SQL injection. Conduct thorough code reviews focusing on all database interaction points to identify and remediate similar injection flaws. Employ Web Application Firewalls (WAFs) with SQL injection detection rules to provide a temporary protective layer. Monitor logs for unusual database query patterns or failed login attempts that may indicate exploitation attempts. Restrict database user privileges to the minimum necessary to limit potential damage. Finally, implement network segmentation to isolate the bicycleSharingServer from critical infrastructure and sensitive data repositories.