CVE-2025-9109 is a security vulnerability identified in the Portabilis i-Diario software versions up to 1.5.0. The flaw resides in an unspecified functionality related to the /password/email endpoint within the Password Recovery component. This vulnerability manifests as an observable response discrepancy, which means that an attacker can remotely interact with the endpoint and observe differences in the system's responses that reveal sensitive information or system behavior. The vulnerability does not require authentication or user interaction, but it has a high complexity level for exploitation, indicating that a successful attack demands significant skill or specific conditions. The CVSS 4.0 base score is 6.3 (medium severity), reflecting a network attack vector with high attack complexity, no privileges required, no user interaction, and limited impact confined to confidentiality (low impact). The vulnerability does not affect integrity or availability, nor does it involve scope changes or privileges escalation. Although the exploit code has been publicly released, there are no known active exploitations in the wild at this time. The vulnerability could potentially allow attackers to gather information that might be used in further attacks or reconnaissance against the system or its users. The lack of a patch link suggests that a fix may not yet be publicly available, increasing the urgency for affected organizations to implement compensating controls or monitor for suspicious activity.

For European organizations using Portabilis i-Diario, particularly educational institutions or entities managing student information systems, this vulnerability poses a risk of information disclosure through the password recovery mechanism. While the direct impact on confidentiality is low, the ability to remotely probe the system and observe response discrepancies could enable attackers to enumerate valid user accounts or gain insights into the password recovery process. This reconnaissance could facilitate targeted phishing, social engineering, or brute force attacks. Given the high complexity of exploitation, widespread automated attacks are less likely, but skilled adversaries could leverage this vulnerability as part of a multi-stage attack. The absence of integrity or availability impacts reduces the risk of direct service disruption or data tampering. However, the exposure of sensitive user information could lead to privacy violations under GDPR and damage institutional reputation. Organizations should be aware that the public availability of exploit code increases the risk of exploitation attempts, necessitating proactive defense measures.

Since no official patch is currently linked, European organizations should implement specific mitigations beyond generic advice: 1) Restrict access to the /password/email endpoint using web application firewalls (WAFs) with rules to detect and block anomalous request patterns indicative of enumeration or probing. 2) Implement rate limiting and CAPTCHA challenges on the password recovery endpoint to hinder automated exploitation attempts. 3) Enhance logging and monitoring to detect unusual access patterns or repeated failed recovery attempts, enabling timely incident response. 4) Review and harden the password recovery workflow to minimize information leakage, such as standardizing response messages regardless of input validity. 5) Conduct internal security assessments or penetration tests focusing on the password recovery functionality to identify and remediate similar response discrepancies. 6) Educate users about phishing risks that could be facilitated by information gathered through this vulnerability. 7) Maintain close communication with Portabilis for timely updates and patches, and plan for prompt deployment once available.