CVE-2025-51658 is a SQL injection vulnerability identified in SemCms version 5.0, specifically exploitable via the 'ID' parameter in the SEMCMS_InquiryView.php script. SQL injection vulnerabilities occur when user-supplied input is improperly sanitized before being incorporated into SQL queries, allowing attackers to manipulate the backend database queries. In this case, the 'ID' parameter is vulnerable, which likely means that an attacker can inject malicious SQL code through this parameter to alter the intended query logic. This can lead to unauthorized data access, data modification, or even complete compromise of the database server. Since the vulnerability is in a content management system (CMS), which typically manages website content and user data, exploitation could allow attackers to extract sensitive information, escalate privileges, or pivot to other parts of the network. The absence of a CVSS score and patch links indicates this vulnerability is newly published (July 14, 2025) and may not yet have an official fix or widespread exploitation. The vulnerability does not require authentication or user interaction, as it is triggered by sending crafted requests to the vulnerable PHP script. No known exploits are currently reported in the wild, but SQL injection remains a high-risk vulnerability class due to its potential impact and ease of exploitation if unmitigated.

For European organizations using SemCms v5.0, this vulnerability poses a significant risk to the confidentiality, integrity, and availability of their web applications and underlying databases. Exploitation could lead to unauthorized disclosure of sensitive data such as customer information, intellectual property, or internal communications. Data integrity could be compromised by unauthorized modification or deletion of records, potentially disrupting business operations or damaging trust. Availability could also be affected if attackers execute destructive queries or cause database crashes. Given the widespread use of CMS platforms in European enterprises, especially in sectors like government, education, healthcare, and e-commerce, the impact could be severe. Additionally, regulatory frameworks such as GDPR impose strict data protection requirements, and a breach resulting from this vulnerability could lead to substantial legal and financial penalties. The lack of a patch increases the urgency for organizations to implement compensating controls to mitigate risk until an official fix is available.

European organizations should immediately audit their use of SemCms to identify any instances of version 5.0. Until a patch is released, it is critical to implement the following mitigations: 1) Employ Web Application Firewalls (WAFs) with rules specifically designed to detect and block SQL injection attempts targeting the 'ID' parameter in SEMCMS_InquiryView.php. 2) Conduct input validation and sanitization at the application level, ensuring that the 'ID' parameter only accepts expected data types and formats (e.g., numeric values). 3) Restrict database user permissions to the minimum necessary, preventing the CMS database user from performing destructive operations. 4) Monitor web server and database logs for unusual query patterns or repeated failed requests that may indicate exploitation attempts. 5) Consider temporarily disabling or restricting access to the vulnerable script if feasible. 6) Stay alert for official patches or updates from SemCms vendors and apply them promptly once available. 7) Educate development and security teams about secure coding practices to prevent similar vulnerabilities in the future.