CVE-2025-59567 is a Missing Authorization vulnerability (CWE-862) identified in the Coupon Affiliates plugin developed by Elliot Sowersby / RelyWP, affecting versions up to 6.8.0. This vulnerability arises from incorrectly configured access control mechanisms, allowing unauthorized users with certain privileges to perform actions or access resources they should not be authorized to. The CVSS 3.1 base score is 4.3 (medium severity), indicating a moderate risk. The vector string CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L shows that the attack can be performed remotely over the network (AV:N) but requires high attack complexity (AC:H) and privileges (PR:H), with no user interaction (UI:N). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. The impact on confidentiality, integrity, and availability is low (C:L/I:L/A:L), suggesting limited data exposure or modification and minor service disruption. The vulnerability is related to missing or improper authorization checks, which can allow privileged users to escalate their permissions or access unauthorized functions within the Coupon Affiliates plugin. Coupon Affiliates is a WordPress plugin used to manage affiliate coupon campaigns, commonly employed by e-commerce and marketing websites to track and manage affiliate referrals and discounts. The lack of a patch link indicates that a fix may not yet be publicly available, and no known exploits are currently reported in the wild. Organizations using this plugin should be aware of the risk of privilege escalation or unauthorized access within their affiliate management systems, which could lead to manipulation of affiliate data, fraudulent coupon usage, or unauthorized changes to affiliate configurations.

For European organizations, especially those relying on WordPress-based e-commerce or marketing platforms utilizing the Coupon Affiliates plugin, this vulnerability poses a moderate risk. Unauthorized access or privilege escalation within affiliate management can lead to financial losses through fraudulent coupon redemptions, manipulation of affiliate commissions, and potential reputational damage if affiliate data integrity is compromised. Additionally, attackers gaining unauthorized access might leverage this foothold to pivot to other parts of the web infrastructure, potentially exposing customer data or disrupting services. Given the medium severity and requirement for high privileges, the threat is more relevant to internal users or compromised accounts rather than external attackers without credentials. However, in environments where privilege management is lax or where multiple administrators exist, the risk increases. The impact on confidentiality, integrity, and availability, while low individually, can cumulatively affect business operations and trust in affiliate marketing programs.

1. Immediate review and tightening of access control policies within the Coupon Affiliates plugin settings and WordPress user roles to ensure that only trusted users have high-level privileges. 2. Implement the principle of least privilege by auditing and minimizing the number of users with administrative or high-level access to the affiliate management system. 3. Monitor logs for unusual activities related to affiliate coupon creation, modification, or deletion to detect potential exploitation attempts early. 4. Until an official patch is released, consider disabling or restricting the Coupon Affiliates plugin functionality that involves sensitive operations or restrict access to it via network-level controls such as IP whitelisting or VPN access. 5. Stay updated with vendor advisories and apply patches promptly once available. 6. Conduct regular security assessments and penetration testing focusing on authorization controls within WordPress plugins, especially those handling financial or marketing data. 7. Educate administrators and users with elevated privileges about the risks of privilege misuse and the importance of secure credential management.