CVE-2025-51652 is a SQL injection vulnerability identified in SemCms version 5.0, specifically exploitable via the 'pid' parameter in the SEMCMS_Categories.php script. SQL injection vulnerabilities occur when user-supplied input is improperly sanitized or validated before being incorporated into SQL queries, allowing attackers to manipulate the database query logic. In this case, an attacker can craft malicious input for the 'pid' parameter to execute arbitrary SQL commands on the backend database. This could lead to unauthorized data access, data modification, or even complete compromise of the database server. Since the vulnerability is located in a category management script, it is likely part of the content management functionality, which is often accessible to unauthenticated users or users with limited privileges, increasing the risk of exploitation. No CVSS score has been assigned yet, and there are no known exploits in the wild at the time of publication. The lack of patch links suggests that a fix may not yet be publicly available or disclosed. The vulnerability was reserved in mid-June 2025 and published in July 2025, indicating recent discovery. The absence of affected version details beyond v5.0 limits precise scope determination, but it is reasonable to assume that SemCms installations running version 5.0 are vulnerable. SemCms is a content management system, and such platforms are common targets for attackers due to their web-facing nature and potential access to sensitive organizational data.

For European organizations using SemCms v5.0, this SQL injection vulnerability poses significant risks. Exploitation could lead to unauthorized disclosure of sensitive data, including customer information, internal documents, or credentials stored in the database. Data integrity could be compromised by unauthorized modification or deletion of records, potentially disrupting business operations or damaging organizational reputation. Availability impacts could arise if attackers execute destructive SQL commands or cause database corruption, leading to downtime of web services reliant on SemCms. Given the web-facing nature of CMS platforms, exploitation could be automated and widespread if attackers develop public exploits. This risk is heightened for organizations that have not implemented compensating controls such as web application firewalls or input validation layers. Additionally, regulatory frameworks in Europe such as GDPR impose strict requirements on data protection; a breach resulting from this vulnerability could lead to legal penalties and loss of customer trust. Organizations in sectors with high data sensitivity, such as finance, healthcare, and government, are particularly at risk.

Immediate mitigation steps include applying any available patches or updates from SemCms developers once released. In the absence of official patches, organizations should implement strict input validation and sanitization on the 'pid' parameter to block malicious payloads. Employing parameterized queries or prepared statements in the backend code can prevent SQL injection by separating code from data. Deploying a web application firewall (WAF) with rules designed to detect and block SQL injection attempts can provide an additional protective layer. Conducting thorough code reviews and penetration testing focused on input handling in SEMCMS_Categories.php and related scripts is recommended. Organizations should also monitor logs for suspicious database query patterns and unusual application behavior indicative of exploitation attempts. Restricting database user privileges to the minimum necessary can limit the impact of a successful injection. Finally, organizations should prepare incident response plans to quickly address potential breaches stemming from this vulnerability.