CVE-2025-3906 is a critical authorization bypass vulnerability in the WordPress plugin 'Integração entre Eduzz e Woocommerce' developed by felipe152. The flaw arises from a missing capability check in the 'wep_opcoes' function, which is responsible for managing plugin options, including the default user registration role. Because this function does not properly verify user permissions, any authenticated user with at least Subscriber-level access can alter the default registration role to Administrator. This manipulation enables attackers to create new Administrator accounts, effectively granting them full control over the WordPress site. The vulnerability affects all versions up to and including 1.7.5. The CVSS 3.1 score of 8.8 indicates a high-severity issue with network attack vector, low attack complexity, requiring only low privileges and no user interaction, and impacting confidentiality, integrity, and availability. Although no known exploits are currently in the wild, the vulnerability's nature makes it a prime target for attackers seeking privilege escalation and site takeover. The plugin is commonly used in Brazil and other countries where Eduzz and Woocommerce integrations are popular, especially in e-commerce environments. The lack of a patch at the time of disclosure increases the urgency for mitigation.

The impact of CVE-2025-3906 is severe for organizations using the affected plugin. Attackers with minimal privileges can escalate to full Administrator access, compromising the entire WordPress site. This can lead to data theft, defacement, insertion of malicious code, ransomware deployment, or use of the site as a launchpad for further attacks. E-commerce sites relying on this plugin risk financial fraud, loss of customer trust, and regulatory penalties due to data breaches. The vulnerability threatens confidentiality (exposure of sensitive data), integrity (unauthorized changes to site content and configurations), and availability (potential site disruptions). Given WordPress's widespread use, the vulnerability could affect thousands of sites globally, particularly those integrating Eduzz payment solutions with Woocommerce. The ease of exploitation and lack of required user interaction increase the likelihood of rapid exploitation once public proof-of-concept code appears.

1. Immediately restrict access to the plugin's administrative functions by limiting Subscriber-level users from accessing or modifying plugin settings until a patch is available. 2. Implement Web Application Firewall (WAF) rules to detect and block unauthorized requests attempting to modify registration roles or plugin options. 3. Monitor user role changes and new Administrator account creations closely via WordPress audit logs and alert on suspicious activities. 4. If possible, disable the plugin temporarily or replace it with alternative solutions that do not have this vulnerability. 5. Follow the plugin vendor's updates closely and apply official patches as soon as they are released. 6. Harden WordPress installations by enforcing the principle of least privilege, ensuring users have only necessary permissions. 7. Conduct regular security audits and penetration testing focusing on privilege escalation vectors. 8. Educate site administrators about the risks of granting Subscriber-level users unnecessary access and encourage strong authentication controls.