CVE-2025-3906 is a high-severity vulnerability (CVSS 8.8) affecting the WordPress plugin 'Integração entre Eduzz e Woocommerce' developed by felipe152. This plugin integrates Eduzz, a digital product payment platform, with WooCommerce, a widely used e-commerce plugin for WordPress. The vulnerability arises from a missing authorization check (CWE-862) in the 'wep_opcoes' function across all plugin versions up to and including 1.7.5. Specifically, the plugin fails to verify whether the authenticated user has the necessary capabilities before allowing modification of the default registration role within the plugin's user registration flow. As a result, any authenticated user with at least Subscriber-level access—which is the lowest level of logged-in user privilege in WordPress—can alter the default role to Administrator. This effectively enables the creation of new Administrator accounts by unauthorized users without requiring higher privileges or user interaction. The vulnerability is remotely exploitable over the network (AV:N) with low attack complexity (AC:L), requiring only low privileges (PR:L) but no user interaction (UI:N). The impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H) because an attacker gaining Administrator privileges can fully control the WordPress site, including installing malicious plugins, stealing sensitive data, defacing the site, or disrupting services. Although no known exploits are currently reported in the wild, the ease of exploitation and severity make this a critical risk for affected sites. The vulnerability is particularly dangerous because it leverages a logic flaw in authorization rather than a technical bypass, making detection and prevention more challenging without proper patching or mitigation.

For European organizations using WordPress sites with the 'Integração entre Eduzz e Woocommerce' plugin, this vulnerability poses a significant risk. Attackers can escalate privileges from minimal Subscriber access to full Administrator control, potentially compromising the entire website and any connected systems. This can lead to data breaches involving customer information, financial data, and intellectual property. E-commerce operations could be disrupted, causing financial losses and reputational damage. Given the plugin's role in integrating payment processing (Eduzz) with WooCommerce, attackers might manipulate payment flows or inject fraudulent transactions. Additionally, compromised Administrator accounts can be used to deploy malware, conduct phishing campaigns, or pivot to internal networks. The impact is especially critical for organizations handling sensitive customer data or regulated industries subject to GDPR, where unauthorized access and data leakage can result in legal penalties and loss of customer trust.

1. Immediate action should be to update the 'Integração entre Eduzz e Woocommerce' plugin to a patched version once released by the vendor. Since no patch links are currently available, monitor official sources and WordPress plugin repositories closely. 2. In the interim, restrict Subscriber-level user registrations or disable new user registrations if not required, to limit potential attacker access. 3. Implement strict role and capability audits on WordPress sites to detect unauthorized changes to user roles, especially Administrator accounts. 4. Employ Web Application Firewalls (WAFs) with custom rules to monitor and block suspicious requests attempting to modify plugin settings or user roles. 5. Conduct regular security scans and monitoring for anomalous account creations or privilege escalations. 6. Harden WordPress installations by disabling unused plugins and enforcing the principle of least privilege for all users. 7. Educate site administrators about this vulnerability and encourage immediate review of user accounts and logs for signs of compromise. 8. Consider isolating critical e-commerce and payment processing components from the main WordPress environment to limit lateral movement in case of compromise.