The OffClicks Invisible Optin plugin versions up to 1.0 contain a CSRF vulnerability that enables attackers to inject stored XSS payloads. This vulnerability can be exploited remotely without privileges but requires user interaction. The CVSS vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and low impact on confidentiality, integrity, and availability.

Successful exploitation can lead to stored XSS, which may allow attackers to execute arbitrary scripts in the context of affected users, potentially leading to session hijacking, defacement, or other malicious actions. The vulnerability affects confidentiality, integrity, and availability to a low degree but is significant due to the stored XSS nature and CSRF exploitation vector.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider implementing CSRF protections such as verifying anti-CSRF tokens and restricting actions to authenticated users. Monitor for updates from OffClicks regarding patches or official mitigations.