CVE-2025-3646 is a security vulnerability identified in the Petlibro Smart Pet Feeder Platform, specifically affecting versions up to 1.7.31. The core issue is a missing authentication or authorization check in the device share API, which manages the sharing of device access among users. This flaw allows an attacker to bypass permission controls and add themselves as shared owners of any targeted smart pet feeder device remotely, without needing any prior authentication or user interaction. By exploiting this vulnerability, attackers can gain unauthorized access to the device, potentially viewing sensitive owner information and controlling device functions intended only for authorized users. The vulnerability is classified with a CVSS 4.0 score of 6.9, reflecting a medium severity level due to its network attack vector, lack of required privileges, and no user interaction needed. The impact on confidentiality, integrity, and availability is limited but significant enough to warrant attention, as unauthorized users could manipulate device settings or access personal data. No patches or exploit code are currently publicly available, and no known exploitation in the wild has been reported. However, the vulnerability poses a privacy and security risk, especially in environments where these smart feeders are deployed in homes or pet care facilities. The lack of authentication checks in critical functions highlights a design weakness in the platform's access control mechanisms.

For European organizations and users, this vulnerability could lead to unauthorized access to smart pet feeders, resulting in privacy violations through exposure of owner information and potential manipulation of device behavior. While the direct operational impact on business continuity is limited, the breach of personal data could contravene GDPR regulations, leading to legal and reputational consequences. Organizations using these devices in pet care services, veterinary clinics, or smart home environments may face increased risk of targeted attacks exploiting this flaw. The vulnerability could also be leveraged as a foothold for lateral movement within a network if the smart feeder is connected to broader IoT or corporate systems. Given the medium severity, the impact is moderate but non-negligible, particularly for privacy-sensitive sectors and consumers in Europe.

Immediate mitigation involves restricting network access to the Petlibro Smart Pet Feeder device share API, ideally by isolating the devices on segmented networks or behind firewalls that limit inbound connections. Users and organizations should monitor for firmware updates or patches from Petlibro and apply them promptly once available. Until patches are released, disabling remote sharing features or removing unnecessary shared users can reduce exposure. Implementing network-level authentication or VPN access for remote device management can add an additional security layer. Regularly auditing device access logs and monitoring for unusual sharing requests can help detect exploitation attempts. Vendors and integrators should review and enhance access control mechanisms in their IoT platforms to prevent similar authorization bypass issues.