CVE-2026-66614 describes an unauthenticated Cross Site Scripting (XSS) vulnerability in the SEO Plugin by Squirrly SEO affecting versions up to 14.2.2. The vulnerability allows remote attackers to execute arbitrary scripts in the context of the affected application without requiring authentication. 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 impacts on confidentiality, integrity, and availability.

Successful exploitation can lead to partial compromise of confidentiality, integrity, and availability of the affected system by executing arbitrary scripts in users' browsers. This can result in session hijacking, defacement, or other malicious actions within the context of the vulnerable plugin.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor the vendor's communications for updates and apply patches once available. Until then, consider limiting exposure by restricting access or disabling the vulnerable plugin if feasible.