CVE-2025-41343 is a missing authorization vulnerability classified under CWE-862 found in CanalDenuncia.app, a platform likely used for whistleblower reporting or sensitive user communications. The vulnerability exists in the backend API endpoint '/backend/api/users/searchUserByEmail.php', which accepts a POST request with an 'email' parameter. Due to the lack of proper authorization checks, an attacker can send crafted POST requests to this endpoint and retrieve information about other users without any authentication or user interaction. This flaw compromises the confidentiality of user data, potentially exposing sensitive personal or organizational information. The vulnerability has been assigned a CVSS 4.0 score of 8.7, reflecting its high severity, with an attack vector that is network-based, low attack complexity, no privileges or user interaction required, and a high impact on confidentiality. No patches are currently available, and no exploits have been reported in the wild, but the vulnerability's nature makes it a prime target for attackers seeking unauthorized access to sensitive data. The vulnerability was reserved in April 2025 and published in November 2025, with INCIBE as the assigner. The absence of authorization controls in a critical API endpoint indicates a significant security design flaw that must be addressed promptly to prevent data breaches.

For European organizations, the impact of CVE-2025-41343 is substantial, particularly for entities relying on CanalDenuncia.app for whistleblower reporting or sensitive communications. Unauthorized access to user information can lead to breaches of personal data, violating GDPR and other data protection regulations, resulting in legal penalties and reputational damage. Confidentiality loss may expose whistleblowers or sensitive informants, potentially endangering individuals and undermining trust in reporting mechanisms. The vulnerability's ease of exploitation means attackers can remotely access data without authentication, increasing the risk of widespread data leakage. Additionally, the exposure of user information could facilitate further targeted attacks such as phishing or social engineering. Organizations may face operational disruptions if the breach leads to investigations or forced suspension of the affected services. The lack of current patches necessitates immediate interim controls to mitigate risk. Overall, the threat compromises data privacy, regulatory compliance, and organizational trust within the European context.

To mitigate CVE-2025-41343, organizations should immediately implement strict authorization checks on the '/backend/api/users/searchUserByEmail.php' endpoint to ensure that only authenticated and authorized users can query user information. This includes validating user roles and permissions before processing requests. Conduct a thorough code review and security audit of all API endpoints to identify and remediate similar authorization flaws. Employ network-level controls such as Web Application Firewalls (WAFs) to detect and block suspicious POST requests targeting this endpoint. Monitor access logs for unusual patterns or repeated queries to the vulnerable API. Educate developers on secure coding practices emphasizing authorization and access control. Engage with the vendor to obtain patches or updates as soon as they become available and apply them promptly. Consider implementing rate limiting and anomaly detection to reduce the risk of automated exploitation. Finally, review and update incident response plans to address potential data breaches resulting from this vulnerability.