CVE-2025-10115 is a SQL Injection vulnerability identified in SiempreCMS versions up to 1.3.6, specifically within the user_search_ajax.php file. The vulnerability arises from improper sanitization or validation of the 'name' or 'userName' parameter, which is directly used in SQL queries without adequate escaping or parameterization. This flaw allows an unauthenticated remote attacker to inject malicious SQL code, potentially manipulating the backend database. The attack vector requires no user interaction or authentication, making it accessible to any remote adversary with network access to the SiempreCMS instance. Exploitation could lead to unauthorized data disclosure, data modification, or even deletion, depending on the database permissions and the crafted payload. Although the CVSS 4.0 score is 6.9 (medium severity), the vulnerability's ease of exploitation and the potential for data compromise make it a significant concern. The exploit has been publicly disclosed, increasing the risk of active exploitation, although no confirmed in-the-wild attacks have been reported yet. SiempreCMS is a content management system used by various organizations to manage web content, and this vulnerability could compromise the integrity and confidentiality of stored data, including user information and site content.

For European organizations using SiempreCMS, this vulnerability presents a tangible risk to the confidentiality, integrity, and availability of their web applications and underlying data. Successful exploitation could lead to unauthorized access to sensitive user data, manipulation of website content, or disruption of services. This could result in reputational damage, regulatory non-compliance (notably with GDPR due to potential personal data exposure), and financial losses. Since the vulnerability requires no authentication and can be exploited remotely, attackers could automate attacks at scale, targeting multiple organizations simultaneously. The medium CVSS score reflects moderate impact, but the public disclosure of the exploit increases urgency. Organizations in sectors such as government, healthcare, education, and e-commerce in Europe, which often rely on CMS platforms, could be particularly affected if they use SiempreCMS without timely patching or mitigation.

1. Immediate patching: Organizations should upgrade SiempreCMS to a version beyond 1.3.6 once a patch is released by the vendor. In the absence of an official patch, consider applying community or vendor-provided workarounds that sanitize input parameters. 2. Input validation and parameterization: Implement strict input validation on the 'name' and 'userName' parameters, ensuring only expected characters are accepted. Use prepared statements or parameterized queries to prevent SQL injection. 3. Web Application Firewall (WAF): Deploy or update WAF rules to detect and block SQL injection attempts targeting SiempreCMS, focusing on the vulnerable parameter patterns. 4. Access controls: Restrict access to the SiempreCMS administrative interfaces and AJAX endpoints to trusted IPs or via VPN to reduce exposure. 5. Monitoring and logging: Enable detailed logging of web requests and database queries to detect anomalous activities indicative of exploitation attempts. 6. Incident response readiness: Prepare to respond to potential breaches by having data backup and recovery plans, and conduct forensic analysis if suspicious activity is detected. 7. Security awareness: Inform development and operations teams about this vulnerability and ensure secure coding practices are followed in future development.