The vulnerability identified as CVE-2025-12675 affects the KiotViet Sync plugin for WordPress, a tool used to synchronize data between WordPress sites and KiotViet, a popular Vietnamese e-commerce platform. The core issue is a missing authorization check 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 very limited capabilities, this vulnerability significantly lowers the barrier for attackers to manipulate plugin settings. The vulnerability does not require user interaction beyond authentication and can be exploited remotely over the network. The impact is primarily on the integrity of the plugin's configuration data, which could lead to misconfigurations, potential data inconsistencies, or enable further attacks if malicious configurations are set. The CVSS v3.1 base score is 4.3, reflecting a medium severity with network attack vector, low attack complexity, and requiring privileges but no user interaction. No patches or fixes have been published yet, and no active exploitation has been reported. The vulnerability is classified under CWE-862 (Missing Authorization), indicating a failure to properly enforce access control in the affected function.

For European organizations using the KiotViet Sync plugin, this vulnerability poses a risk to the integrity of their e-commerce data synchronization processes. Unauthorized modification of plugin configurations could disrupt business operations, cause data inconsistencies, or open pathways for further exploitation, such as injecting malicious configurations or redirecting data flows. While confidentiality and availability are not directly impacted, the integrity compromise could lead to loss of trust, operational downtime, or compliance issues, especially under GDPR if personal data is involved. Organizations relying on WordPress for e-commerce or content management that integrate with KiotViet or similar plugins should be aware that even low-privilege users can exploit this vulnerability, increasing the attack surface. The lack of known exploits in the wild provides a window for proactive mitigation, but the ease of exploitation and network accessibility make timely action important.

1. Immediately restrict access to the KiotViet Sync plugin settings by limiting which user roles can access or modify plugin configurations, ideally to Administrator roles only. 2. Implement strict role-based access controls (RBAC) in WordPress to ensure Subscriber-level users cannot access plugin configuration endpoints. 3. Monitor and audit changes to plugin configurations using WordPress logging plugins or external SIEM solutions to detect unauthorized modifications promptly. 4. Disable or remove the KiotViet Sync plugin if it is not essential to business operations until a patch is released. 5. Engage with the plugin vendor or community to obtain or request a security patch that adds proper capability checks to the saveConfig() function. 6. Harden WordPress installations by applying security best practices such as limiting plugin installations, enforcing strong authentication, and keeping all components updated. 7. Consider implementing Web Application Firewalls (WAF) rules to detect and block suspicious requests targeting plugin configuration endpoints. 8. Educate users about the risks of privilege escalation and enforce the principle of least privilege for all user accounts.