CVE-2025-64228 is a vulnerability identified in the FantasticPlugins SUMO Affiliates Pro plugin, affecting all versions up to and including 11.0.0. The flaw allows an attacker with limited privileges (PR:L) to remotely retrieve embedded sensitive system information without requiring user interaction (UI:N). The vulnerability is exploitable over the network (AV:N) and has a low attack complexity (AC:L), meaning it does not require specialized conditions to exploit once access is obtained. The impact is limited to confidentiality (C:L), with no direct effect on integrity or availability. The exposed sensitive information could include configuration details, API keys, or other embedded data that could facilitate further attacks or unauthorized access. The vulnerability does not require user interaction, increasing the risk of automated exploitation if credentials or access are compromised. Although no known exploits are currently reported in the wild, the presence of this vulnerability in a widely used affiliate marketing plugin for WordPress sites presents a notable risk. The lack of available patches at the time of publication necessitates proactive mitigation steps by administrators. The vulnerability’s CVSS score of 4.3 reflects its medium severity, balancing ease of exploitation with limited impact scope.

For European organizations, the exposure of sensitive system information can lead to several adverse outcomes. Confidential data leakage may enable attackers to map internal systems, identify further vulnerabilities, or escalate privileges within the affected environment. Organizations relying on SUMO Affiliates Pro for affiliate marketing or e-commerce operations risk unauthorized disclosure of business-sensitive information, potentially harming competitive advantage and customer trust. While the vulnerability does not directly compromise data integrity or system availability, the leaked information could be leveraged in multi-stage attacks, including phishing, credential stuffing, or lateral movement within networks. The impact is particularly significant for companies handling personal data under GDPR, as any unauthorized data exposure could lead to regulatory scrutiny and fines. Additionally, the vulnerability could undermine the security posture of digital marketing ecosystems, which are critical for revenue generation in many European businesses.

Administrators should immediately monitor for unusual access patterns to the SUMO Affiliates Pro plugin interface and restrict access to trusted IP addresses or VPNs to reduce exposure. Since no official patches are currently available, consider temporarily disabling the plugin or limiting its functionality until a vendor update is released. Implement strict role-based access controls to ensure only necessary users have privileges to the plugin’s management features. Regularly audit logs for unauthorized attempts to access sensitive information. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting the plugin. Stay informed through vendor communications and security advisories to apply patches promptly once released. Additionally, conduct internal security assessments to identify any potential exploitation and review the overall security configuration of affiliate marketing platforms. Educate staff on the risks associated with exposed system information and reinforce secure credential management practices.