CVE-2025-41340 is a missing authorization vulnerability classified under CWE-862 found in the CanalDenuncia.app, a platform likely used for whistleblower or complaint reporting. The vulnerability arises because the backend API endpoint '/backend/api/buscarTipoDenunciabyId.php' does not properly verify whether the requesting user is authorized to access the data identified by the POST parameters 'id_tp_denuncia' and 'id_sociedad'. This lack of authorization checks allows an attacker to craft POST requests that retrieve information belonging to other users without any authentication or user interaction. The vulnerability has a CVSS 4.0 score of 8.7, indicating a high severity due to its network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and a high impact on confidentiality (VC:H) with no impact on integrity or availability. The vulnerability was reserved in April 2025 and published in November 2025, with no known exploits or patches available yet. The absence of authentication and authorization controls on sensitive API endpoints can lead to unauthorized data disclosure, potentially exposing sensitive whistleblower reports or personal information. This flaw highlights the critical need for robust access control mechanisms in applications handling sensitive data. The vendor project CanalDenuncia should prioritize patch development and deployment to remediate this issue.

For European organizations, the impact of CVE-2025-41340 is significant, especially for entities relying on CanalDenuncia.app for whistleblower or complaint management. Unauthorized access to sensitive user data can lead to privacy violations, regulatory non-compliance (e.g., GDPR breaches), reputational damage, and potential legal consequences. Confidentiality is severely compromised as attackers can retrieve other users' information without authentication. This could undermine trust in whistleblower systems, discourage reporting of misconduct, and expose organizations to insider threat risks. The lack of integrity and availability impact reduces the risk of system disruption but does not mitigate the severe data exposure threat. Organizations in regulated sectors such as finance, healthcare, and public administration are particularly vulnerable due to the sensitive nature of the data handled. The absence of known exploits currently provides a window for proactive mitigation, but the ease of exploitation and network accessibility make rapid response critical to prevent abuse.

1. Implement strict authorization checks on all API endpoints, especially those handling sensitive data, ensuring that users can only access information they are permitted to view. 2. Conduct a comprehensive security audit of CanalDenuncia.app’s backend APIs to identify and remediate similar missing authorization vulnerabilities. 3. Employ role-based access control (RBAC) or attribute-based access control (ABAC) mechanisms to enforce fine-grained permissions. 4. Monitor API access logs for unusual or unauthorized access patterns, such as repeated requests with varying 'id_tp_denuncia' or 'id_sociedad' parameters. 5. Apply network-level protections such as Web Application Firewalls (WAFs) with custom rules to detect and block suspicious POST requests targeting vulnerable endpoints. 6. Engage with the vendor or development team to prioritize the release and deployment of patches addressing this vulnerability. 7. Educate internal security teams and developers on secure coding practices related to authorization and authentication. 8. If possible, isolate or restrict access to the vulnerable API endpoints until patches are applied. 9. Review and update incident response plans to include scenarios involving unauthorized data access through API vulnerabilities.