The OffClicks Invisible Optin plugin, version 1.0 and earlier, contains a CSRF vulnerability that can be exploited to inject stored XSS payloads. This vulnerability allows an attacker to trick an authenticated user into submitting a forged request, which results in malicious scripts being stored and executed in the context of the affected application. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and low impact on confidentiality, integrity, and availability.

Successful exploitation of this vulnerability can lead to stored XSS attacks, potentially allowing attackers to execute arbitrary scripts in the context of users interacting with the vulnerable plugin. This can compromise user data confidentiality and integrity, and may also affect availability. The vulnerability requires user interaction and can be exploited remotely without privileges.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider disabling or removing the OffClicks Invisible Optin plugin if feasible. Monitor vendor communications for updates regarding patches or official mitigations.