CVE-2025-9108 is a medium-severity vulnerability affecting multiple versions (1.0 through 1.5.0) of the Portabilis i-Diario software, specifically an unknown function within the Login Page component. The vulnerability arises from improper restriction of rendered UI layers, which can be manipulated remotely by an attacker. This flaw allows an adversary to interfere with the user interface rendering process, potentially enabling UI redressing attacks such as clickjacking or overlay attacks. Because the vulnerability does not require any privileges or authentication and can be exploited remotely with low attack complexity, it poses a risk to the integrity and availability of the login process. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P) indicates that user interaction is required, but no privileges or authentication are needed, and the impact on confidentiality is none, with low impact on integrity and no impact on availability. There are no known exploits in the wild yet, and no patches have been linked, indicating that mitigation may currently rely on configuration or workaround measures. The vulnerability could be leveraged to trick users into performing unintended actions or to bypass certain UI restrictions, potentially leading to unauthorized access or session hijacking if combined with other vulnerabilities.

For European organizations using Portabilis i-Diario, particularly educational institutions or administrative bodies that rely on this software for managing academic records and attendance, this vulnerability could disrupt normal login operations or enable attackers to deceive users into unintended actions. While the direct confidentiality impact is minimal, the integrity of the login process could be compromised, leading to potential unauthorized access or manipulation of user sessions. This could result in data integrity issues, unauthorized data access, or denial of service to legitimate users. Given the remote exploitability and lack of required privileges, attackers could target multiple organizations at scale. The impact is heightened in sectors where i-Diario is widely deployed, affecting operational continuity and trust in digital education management systems.

Organizations should prioritize updating to a patched version once available from Portabilis. In the absence of patches, implementing Content Security Policy (CSP) headers to restrict framing and embedding of the login page can mitigate UI redressing attacks. Additionally, enabling X-Frame-Options headers (e.g., DENY or SAMEORIGIN) will prevent clickjacking attempts. User education to recognize suspicious UI behavior and multi-factor authentication (MFA) can reduce the risk of session hijacking. Network-level protections such as Web Application Firewalls (WAFs) can be configured to detect and block suspicious UI manipulation attempts. Regular security assessments and penetration testing focusing on UI vulnerabilities should be conducted. Monitoring login page traffic for anomalies and unusual user interactions can help detect exploitation attempts early.