This vulnerability (CVE-2026-40770) is an instance of CWE-79, improper neutralization of input during web page generation, resulting in unauthenticated cross-site scripting (XSS) in RelyWP Coupon Affiliates plugin versions up to 7.5.3. The CVSS 3.1 base score is 7.1, indicating a high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and scope changed. The impact includes low confidentiality, integrity, and availability impacts. No official patch or remediation level has been published as of the data available.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the affected web application without authentication. This may lead to partial disclosure of information, modification of data, and limited disruption of service. The CVSS vector indicates that user interaction is required and the attack scope is changed, meaning the vulnerability affects components beyond the initially vulnerable component.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level is provided, users should monitor the vendor's communications for updates. Until a patch is available, consider applying web application firewall (WAF) rules to detect and block XSS attempts specific to this plugin and restrict access where possible.