CVE-2025-62978 identifies a Missing Authorization vulnerability in the Kiotviet KiotViet Sync software, specifically affecting versions up to and including 1.8.5. The vulnerability arises from improperly configured access control security levels within the synchronization service, allowing attackers to bypass authorization checks. This misconfiguration can lead to unauthorized access to synchronization functions, potentially enabling attackers to read, modify, or disrupt data synchronization processes. KiotViet Sync is a business synchronization tool commonly used for integrating sales, inventory, and other operational data. The lack of a CVSS score indicates that the vulnerability is newly published and has not yet been fully assessed. No known exploits have been reported, but the nature of the flaw suggests that exploitation could be straightforward if an attacker has network access to the vulnerable service. The vulnerability does not require user interaction, increasing its risk profile. The absence of patches at the time of publication means organizations must rely on configuration reviews and monitoring until updates are available. The vulnerability's impact is primarily on confidentiality and integrity of synchronized data, with potential availability impacts if synchronization processes are disrupted.

For European organizations, especially small and medium-sized enterprises (SMEs) using KiotViet Sync for operational data synchronization, this vulnerability poses a significant risk. Unauthorized access could lead to data leakage, manipulation of inventory or sales data, and disruption of business processes. This could result in financial losses, reputational damage, and regulatory compliance issues, particularly under GDPR if personal data is involved. The synchronization service often integrates critical business functions, so exploitation could cascade into broader operational impacts. Since KiotViet Sync is less common in Europe compared to Southeast Asia, the impact may be concentrated among companies with direct business ties or subsidiaries using this software. However, the risk remains relevant for any European entity relying on this product. The lack of known exploits reduces immediate risk but does not eliminate the threat, as attackers may develop exploits rapidly once the vulnerability details are public. The potential for unauthorized access without user interaction increases the threat level, especially in environments with exposed or poorly segmented network access to the synchronization service.

1. Immediately audit and review access control configurations within KiotViet Sync to ensure that authorization checks are correctly enforced and that only authorized users have access to synchronization functions. 2. Restrict network access to the KiotViet Sync service using firewalls or network segmentation to limit exposure to trusted internal networks or VPNs. 3. Monitor logs and network traffic for unusual access patterns or unauthorized synchronization attempts. 4. Engage with the vendor to obtain patches or updates addressing this vulnerability as soon as they become available and apply them promptly. 5. Implement multi-factor authentication (MFA) where possible to add an additional layer of security around access to synchronization services. 6. Educate IT staff and users about the vulnerability and the importance of reporting suspicious activity. 7. Consider deploying intrusion detection/prevention systems (IDS/IPS) tuned to detect anomalous behavior related to synchronization processes. 8. If immediate patching is not possible, consider temporary disabling or isolating the synchronization service until a fix is applied.