CVE-2026-1552 identifies a SQL injection vulnerability in SEMCMS version 5.0, located in the /SEMCMS_Info.php file. The vulnerability arises from improper sanitization of the 'searchml' parameter, which an attacker can manipulate to inject arbitrary SQL commands. This injection can be executed remotely without requiring user interaction or elevated privileges, making exploitation feasible over the network with low complexity. The vulnerability impacts the confidentiality, integrity, and availability of the backend database, potentially allowing attackers to extract sensitive data, modify or delete records, or disrupt service. Despite early notification, the vendor has not responded or released patches, and public exploit information is available, increasing the risk of active exploitation. The CVSS 4.0 score of 5.3 reflects a medium severity, considering the limited privileges required and the partial impact on data confidentiality and integrity. No known exploits in the wild have been reported yet, but the public disclosure and exploit availability necessitate urgent attention. The vulnerability affects only SEMCMS 5.0 installations, so organizations running other versions or different CMS platforms are not impacted. The lack of vendor response complicates remediation, requiring organizations to implement compensating controls and possibly custom patches or input validation fixes.

For European organizations using SEMCMS 5.0, this vulnerability poses a significant risk to the security of their web applications and underlying databases. Successful exploitation could lead to unauthorized data access, data manipulation, or denial of service, impacting business operations and regulatory compliance, especially under GDPR. Sensitive customer or internal data could be exposed or altered, leading to reputational damage and potential legal penalties. The remote and unauthenticated nature of the attack vector increases the likelihood of exploitation, particularly in environments with internet-facing SEMCMS installations. The absence of vendor patches means organizations must rely on internal mitigation, increasing operational overhead. Sectors such as government, finance, healthcare, and critical infrastructure in Europe that utilize SEMCMS may face heightened risks. Additionally, the public availability of exploit code lowers the barrier for attackers, including cybercriminal groups and opportunistic threat actors targeting European entities.

Given the lack of official patches, European organizations should immediately audit all SEMCMS 5.0 installations to identify vulnerable endpoints, especially the /SEMCMS_Info.php file. Implement strict input validation and parameter sanitization on the 'searchml' parameter to neutralize SQL injection payloads. Deploy Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting this parameter. Monitor database logs and application behavior for unusual queries or anomalies indicative of exploitation attempts. Consider isolating or restricting access to SEMCMS instances from untrusted networks to reduce exposure. If feasible, upgrade to a newer, unaffected CMS version or migrate to alternative platforms. Conduct regular security assessments and penetration tests focusing on injection flaws. Establish incident response plans to quickly address any detected exploitation. Engage with the vendor or community for updates and share threat intelligence within European cybersecurity networks to enhance collective defense.