CVE-2025-12918 is a vulnerability identified in the yungifez Skuul School Management System, specifically affecting versions 2.6.0 through 2.6.5. The issue resides in the /dashboard/fees/fee-invoices/ component, within an unspecified function that processes the invoice_id parameter. Improper validation or control of this resource identifier allows an attacker to manipulate the argument, potentially leading to unauthorized access or manipulation of fee invoice data. The vulnerability is remotely exploitable without requiring user interaction or authentication, but the attack complexity is high, indicating that exploitation requires significant skill or conditions. The CVSS 4.0 vector (AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P) reflects network attack vector, high complexity, low privileges, no user interaction, and partial impact on confidentiality. The vendor has not responded to disclosure requests, and no patches are currently available. Although an exploit has been publicly released, no active exploitation in the wild has been reported. This vulnerability primarily threatens confidentiality by potentially exposing sensitive financial records within the school management system. The lack of integrity or availability impact reduces the overall severity. The system’s role in managing sensitive student and financial data makes this a concern for educational institutions relying on this software.

For European organizations, particularly educational institutions using the yungifez Skuul School Management System, this vulnerability could lead to unauthorized disclosure of sensitive financial information related to student fees and invoices. While the impact on system integrity and availability is minimal, confidentiality breaches could result in privacy violations and regulatory non-compliance, especially under GDPR. The complexity and difficulty of exploitation reduce the immediate risk, but the public availability of an exploit increases the potential threat over time. Organizations may face reputational damage and potential legal consequences if sensitive data is exposed. The lack of vendor response and patches means that affected entities must rely on internal mitigations until an official fix is released. Given the critical nature of educational data and the increasing digitization of school management systems in Europe, this vulnerability warrants attention despite its low CVSS score.

Organizations should implement strict access controls around the fee invoice components, ensuring that only authorized personnel with appropriate privileges can access or manipulate invoice data. Network segmentation and firewall rules should limit external access to the management system’s dashboard, reducing exposure to remote attacks. Employing web application firewalls (WAFs) with custom rules to detect and block anomalous requests manipulating the invoice_id parameter can provide an additional layer of defense. Regular monitoring and logging of access to fee invoice resources should be established to detect suspicious activities early. Since no vendor patch is available, organizations should consider temporary compensating controls such as disabling the vulnerable component if feasible or restricting access to trusted IP ranges. Promptly applying any future patches or updates from the vendor is critical. Additionally, conducting security awareness training for administrators about this vulnerability and safe handling of sensitive data is recommended.