CVE-2025-67566 identifies a missing authorization vulnerability in the Woffice Core product developed by WofficeIO, affecting versions up to and including 5.4.30. This vulnerability stems from incorrectly configured access control security levels, which means that certain functions or data that should be restricted can be accessed without proper authorization checks. Missing authorization vulnerabilities typically allow attackers to bypass intended security controls, potentially leading to unauthorized data exposure, modification, or other malicious actions within the affected application. Although no known exploits have been reported in the wild, the vulnerability's presence in a core collaboration platform component raises concerns about the confidentiality and integrity of organizational data. The lack of a CVSS score indicates that the vulnerability is newly published and not yet fully assessed, but the nature of missing authorization issues generally implies a significant risk. The vulnerability does not specify whether authentication is required or if user interaction is needed, but missing authorization often allows exploitation by authenticated users with limited privileges or sometimes even unauthenticated users, depending on the configuration. The absence of patch links suggests that a fix may not yet be publicly available, emphasizing the need for immediate mitigation steps by organizations using Woffice Core. Overall, this vulnerability highlights the critical importance of correctly implementing and verifying access control mechanisms in web-based collaboration platforms.

For European organizations, the impact of CVE-2025-67566 could be substantial, especially for those relying on Woffice Core for internal collaboration, document management, or project coordination. Unauthorized access enabled by this vulnerability could lead to exposure of sensitive corporate data, intellectual property, or personal information, violating GDPR and other data protection regulations. Integrity risks include unauthorized modification or deletion of data, potentially disrupting business operations or damaging trust. Availability impact is less direct but could occur if attackers leverage unauthorized access to disrupt services. The risk is heightened in sectors such as finance, healthcare, government, and critical infrastructure, where confidentiality and data integrity are paramount. Additionally, the lack of known exploits does not preclude future attacks, and the vulnerability could be targeted by threat actors once exploit techniques become available. European organizations must consider the regulatory and reputational consequences of breaches resulting from this vulnerability.

1. Immediately audit and review all access control configurations within Woffice Core installations to identify and rectify any improperly configured security levels. 2. Implement strict role-based access controls (RBAC) ensuring that users have the minimum necessary privileges. 3. Monitor logs and access patterns for unusual or unauthorized activities that could indicate exploitation attempts. 4. Engage with WofficeIO or trusted security advisories to obtain patches or updates as soon as they are released; prioritize patch deployment. 5. If patches are not yet available, consider temporary compensating controls such as network segmentation, restricting access to the Woffice Core application to trusted IP ranges, or disabling vulnerable features if feasible. 6. Conduct penetration testing focused on authorization controls to proactively identify weaknesses. 7. Train administrators and developers on secure access control implementation and verification. 8. Maintain an incident response plan tailored to potential data breaches or unauthorized access incidents stemming from this vulnerability.