CVE-2025-26186 is a SQL Injection vulnerability identified in openSIS version 9.1, specifically exploitable via the 'id' parameter in the Ajax.php script. openSIS is an open-source student information system widely used by educational institutions to manage student data, attendance, grades, and other academic records. The vulnerability allows a remote attacker to inject malicious SQL code through the 'id' parameter, which is likely used to query or manipulate database records. Successful exploitation could enable the attacker to execute arbitrary SQL commands, potentially leading to unauthorized data access, data modification, or even remote code execution if the database backend or application logic is vulnerable to such chained attacks. The absence of a CVSS score and patch information suggests this vulnerability is newly disclosed and may not yet have an official fix or widespread exploitation. The attack vector is remote and does not require authentication, increasing the risk profile. Given the nature of SQL Injection, the attacker could extract sensitive student and staff information, alter academic records, or disrupt the availability of the system by corrupting the database. The vulnerability resides in a critical component of the application that handles asynchronous requests, which are common in modern web applications, making exploitation feasible with crafted HTTP requests.

For European organizations, particularly educational institutions using openSIS, this vulnerability poses a significant risk to the confidentiality, integrity, and availability of sensitive student and institutional data. Compromise could lead to exposure of personally identifiable information (PII), including student identities, grades, and attendance records, which are protected under GDPR regulations. Data tampering could undermine academic integrity and institutional trust. Additionally, disruption of the SIS could affect daily operations, impacting students, faculty, and administrative staff. The reputational damage and potential regulatory penalties from data breaches could be severe. Since openSIS is used globally and in Europe by various schools and universities, the threat could affect a broad range of institutions, especially those with limited cybersecurity resources or delayed patch management processes. The lack of known exploits in the wild currently reduces immediate risk but also means organizations must proactively address the vulnerability before attackers develop and deploy exploits.

Organizations should immediately audit their openSIS deployments to identify affected versions, particularly version 9.1. In the absence of an official patch, applying web application firewall (WAF) rules to detect and block SQL Injection patterns targeting the 'id' parameter in Ajax.php is critical. Input validation and parameterized queries should be implemented or verified in the application code to prevent injection. Network segmentation and limiting access to the openSIS application to trusted networks can reduce exposure. Monitoring web server and database logs for suspicious queries or anomalies related to the Ajax.php endpoint is advised. Institutions should also prepare incident response plans specific to data breaches involving student information. Once a patch is released, prompt application is essential. Additionally, conducting security assessments or penetration tests focused on injection vulnerabilities can help identify other potential weaknesses.