CVE-2025-51654 is a SQL injection vulnerability identified in SemCms version 5.0, specifically exploitable via the 'pid' parameter in the SEMCMS_Infocategories.php script. SQL injection vulnerabilities occur when untrusted input is improperly sanitized and directly incorporated into SQL queries, allowing an attacker to manipulate the backend database. In this case, the 'pid' parameter is vulnerable, which likely corresponds to a category or content identifier within the CMS. Exploiting this flaw could enable an attacker to execute arbitrary SQL commands, potentially leading to unauthorized data access, data modification, or even complete compromise of the database. Since SemCms is a content management system, the database likely contains sensitive content, user information, and configuration data. The absence of a CVSS score and lack of known exploits in the wild suggest this vulnerability is newly disclosed and not yet widely weaponized. However, the technical details confirm the vulnerability is publicly known and published as of July 14, 2025. No patch or mitigation links are currently available, indicating that users of SemCms 5.0 must take immediate protective measures. The lack of authentication requirements or user interaction details means the attack vector could be remotely exploitable by unauthenticated attackers simply by sending crafted HTTP requests to the vulnerable endpoint. This elevates the risk considerably, as automated scanning and exploitation attempts could be feasible. Overall, this vulnerability represents a significant risk to the confidentiality, integrity, and availability of systems running SemCms 5.0 without proper input validation or protective controls.

For European organizations using SemCms 5.0, this SQL injection vulnerability poses a serious threat. Successful exploitation could lead to unauthorized disclosure of sensitive business data, including customer information, internal documents, or intellectual property stored within the CMS database. Data integrity could be compromised by unauthorized modification or deletion of content, potentially disrupting business operations or damaging organizational reputation. Additionally, attackers might leverage this vulnerability to escalate privileges or pivot within the network, increasing the scope of compromise. The availability of the CMS could also be affected if attackers execute destructive SQL commands or cause database corruption. Given the critical role of CMS platforms in managing web content and digital presence, exploitation could result in website defacement, loss of customer trust, and regulatory compliance violations under GDPR if personal data is exposed. The lack of known exploits currently provides a window for European organizations to proactively mitigate risk before widespread attacks occur. However, the ease of exploitation without authentication means that attackers could rapidly target vulnerable systems, especially those exposed to the internet without adequate web application firewalls or intrusion detection systems.

European organizations should immediately audit their web infrastructure to identify any deployments of SemCms version 5.0. If found, they should isolate these systems from public access until a patch or official fix is released by the vendor. In the absence of a vendor patch, organizations can implement web application firewall (WAF) rules specifically designed to detect and block SQL injection attempts targeting the 'pid' parameter in SEMCMS_Infocategories.php. Input validation and parameterized queries should be enforced if organizations have the capability to modify the CMS codebase. Network segmentation can limit the impact of a potential breach. Continuous monitoring of web server logs for suspicious query patterns related to 'pid' parameter manipulation is recommended. Additionally, organizations should conduct penetration testing focused on SQL injection vectors to verify the presence and exploitability of this vulnerability. Backup procedures must be reviewed and tested to ensure rapid recovery in case of data corruption or loss. Finally, organizations should subscribe to vendor advisories and threat intelligence feeds to receive updates on patches or exploit developments for CVE-2025-51654.