CVE-2025-64228 is a vulnerability identified in FantasticPlugins SUMO Affiliates Pro, a WordPress plugin used for managing affiliate marketing programs. The flaw allows an unauthorized control sphere—meaning users with limited privileges—to retrieve embedded sensitive system information that should normally be protected. This exposure could include configuration details, API keys, or other sensitive data embedded within the plugin or its environment. The vulnerability affects all versions up to and including 11.0.0, with no specific version exclusions noted. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N) indicates that the attack can be performed remotely over the network with low attack complexity, requires low privileges (authenticated user with limited rights), no user interaction, and results in a confidentiality impact only. There is no impact on integrity or availability. The vulnerability was published on October 29, 2025, and no public exploits have been reported yet. The lack of patches linked suggests that a fix may be pending or not yet publicly released. This type of information exposure can facilitate further attacks by providing attackers with insights into system configurations or credentials, potentially enabling privilege escalation or lateral movement in a compromised environment. Organizations using this plugin should be aware of the risk and monitor for suspicious activity.

For European organizations, the exposure of sensitive system information can lead to increased risk of targeted attacks, including privilege escalation and data breaches. Although the vulnerability itself does not directly compromise system integrity or availability, the leaked information could be leveraged by attackers to craft more effective exploits or social engineering attacks. Organizations heavily reliant on affiliate marketing through WordPress sites using SUMO Affiliates Pro are at risk of unauthorized data exposure. This could impact customer trust, regulatory compliance (such as GDPR), and lead to potential financial and reputational damage. The medium severity rating reflects a moderate risk that requires timely attention but is not immediately critical. The risk is heightened in sectors with strict data protection requirements or where affiliate marketing platforms integrate with sensitive backend systems.

1. Monitor FantasticPlugins official channels for patches addressing CVE-2025-64228 and apply updates promptly once available. 2. Restrict access to the SUMO Affiliates Pro plugin interface to only trusted and necessary users, employing role-based access controls to minimize privilege levels. 3. Implement network-level controls such as IP whitelisting or VPN access for administrative interfaces to reduce exposure. 4. Conduct regular audits of plugin configurations and logs to detect unusual access patterns or attempts to retrieve sensitive information. 5. Consider temporarily disabling or removing the plugin if immediate patching is not possible and the risk is deemed unacceptable. 6. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting the plugin endpoints. 7. Educate administrators on the risks of privilege escalation and the importance of strong authentication mechanisms. 8. Review and minimize embedded sensitive data within plugin configurations to reduce the attack surface.