The vulnerability identified as CVE-2025-12675 affects the mykiot KiotViet Sync plugin for WordPress, specifically versions up to and including 1.8.5. The root cause is a missing authorization check (CWE-862) in the saveConfig() function, which is responsible for saving the plugin's configuration settings. This flaw allows any authenticated user with at least Subscriber-level privileges to modify the plugin's configuration without proper permission validation. Since WordPress Subscriber roles typically have minimal privileges, this vulnerability significantly lowers the barrier for attackers to alter plugin behavior. The vulnerability is remotely exploitable over the network without requiring user interaction, increasing its risk profile. The CVSS v3.1 score is 4.3 (medium severity), reflecting limited impact on confidentiality and availability but a direct impact on integrity. The absence of known exploits in the wild suggests it is not yet actively exploited, but the ease of exploitation and the potential for misuse warrant attention. The plugin is commonly used in e-commerce and business environments to synchronize data, so unauthorized configuration changes could disrupt operations or facilitate further attacks. No official patches were linked at the time of publication, emphasizing the need for vigilance and interim mitigations.

For European organizations, this vulnerability poses a risk primarily to the integrity of their WordPress-based e-commerce or business platforms using the KiotViet Sync plugin. Unauthorized configuration changes could lead to misconfigurations that disrupt data synchronization, cause business process failures, or open avenues for additional attacks such as privilege escalation or data manipulation. While confidentiality and availability are not directly impacted, the integrity compromise can affect trustworthiness and operational continuity. Organizations with multiple users having Subscriber or higher roles are at increased risk, as attackers can leverage low-privilege accounts to exploit the vulnerability. Given the widespread use of WordPress in Europe, especially in small and medium enterprises, the vulnerability could have a broad impact if not addressed promptly. The lack of known exploits currently reduces immediate risk but does not eliminate the potential for future exploitation.

1. Monitor official channels for patches or updates from the mykiot vendor and apply them immediately once available. 2. In the interim, restrict the number of users with Subscriber or higher roles to the minimum necessary, and review user permissions carefully. 3. Implement WordPress security plugins or custom code to enforce capability checks on the saveConfig() function or block unauthorized access to plugin configuration endpoints. 4. Conduct regular audits of plugin configuration changes and maintain logs to detect unauthorized modifications promptly. 5. Employ web application firewalls (WAFs) with rules targeting suspicious requests to the KiotViet Sync plugin endpoints. 6. Educate administrators and users on the risks of privilege misuse and enforce strong authentication practices to reduce the risk of compromised accounts. 7. Consider isolating critical WordPress instances or using role-based access control (RBAC) enhancements to limit plugin configuration access further.