CVE-2025-49334 is classified under CWE-639, indicating an authorization bypass through a user-controlled key in the Eduardo Villão MyD Delivery software. This vulnerability arises from incorrectly configured access control security levels, allowing attackers to manipulate keys that control authorization checks. The flaw affects all versions up to 1.3.7, with no specific version range provided. The vulnerability is remotely exploitable over the network without requiring authentication or user interaction, as indicated by the CVSS vector (AV:N/AC:L/PR:N/UI:N). The impact is limited to confidentiality loss, as attackers can access data they should not be authorized to see, but cannot modify data or disrupt availability. No known exploits have been reported in the wild, and no patches are currently available. The root cause is improper validation and enforcement of access control policies, allowing attackers to bypass restrictions by supplying crafted keys or tokens. This can lead to unauthorized access to sensitive delivery information, potentially exposing customer data or internal logistics details. Given the nature of the product—a delivery management system—such unauthorized access could facilitate further attacks or data leakage. Organizations relying on MyD Delivery should urgently audit their access control implementations and prepare to apply fixes once available.

For European organizations, the primary impact of this vulnerability is unauthorized disclosure of sensitive delivery and customer data managed by MyD Delivery. This could lead to privacy violations under GDPR, reputational damage, and potential regulatory penalties. Since the vulnerability does not affect data integrity or availability, operational disruption is less likely. However, unauthorized access to delivery information could enable attackers to conduct targeted fraud, intercept shipments, or gather intelligence for further attacks. Logistics companies, e-commerce platforms, and supply chain operators using MyD Delivery are particularly at risk. The medium severity reflects a moderate risk level, but the ease of exploitation without authentication increases the urgency for mitigation. The lack of known exploits in the wild suggests the threat is currently theoretical but could be weaponized if the vulnerability becomes widely known. European entities must consider the sensitivity of their delivery data and the potential cascading effects of unauthorized access in their risk assessments.

1. Immediately conduct a thorough review of all access control mechanisms within MyD Delivery, focusing on how user-controlled keys are validated and enforced. 2. Implement strict server-side validation to ensure keys or tokens used for authorization cannot be manipulated by users. 3. Employ role-based access control (RBAC) or attribute-based access control (ABAC) models to enforce least privilege principles robustly. 4. Monitor application logs for unusual access patterns or repeated attempts to use unauthorized keys. 5. Restrict network access to the MyD Delivery management interfaces to trusted IP ranges where possible. 6. Prepare for patch deployment by establishing communication channels with the vendor and subscribing to security advisories. 7. Conduct penetration testing focused on authorization bypass scenarios to identify any additional weaknesses. 8. Educate internal teams about the risks of authorization bypass and encourage prompt reporting of suspicious activity. 9. If feasible, implement multi-factor authentication (MFA) on administrative interfaces to add an additional security layer. 10. Review data exposure policies and encrypt sensitive data at rest and in transit to minimize impact if unauthorized access occurs.