The FULL – Cliente WordPress plugin suffers from a reflected XSS vulnerability due to improper neutralization of input during web page generation. Specifically, the plugin uses add_query_arg and remove_query_arg functions without proper escaping of URL parameters, enabling injection of malicious scripts. This affects all versions up to and including 3.1.22. Exploitation requires user interaction, such as clicking a malicious link, and can lead to script execution in the victim's browser context.

Successful exploitation can lead to the execution of arbitrary scripts in the context of the victim's browser, potentially allowing attackers to steal session tokens, perform actions on behalf of the user, or conduct phishing attacks. The vulnerability does not allow direct system compromise or denial of service but can impact confidentiality and integrity of user sessions.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should avoid clicking on suspicious links related to the FULL – Cliente plugin and consider disabling or removing the plugin if possible. Monitor vendor channels for updates regarding patches or official mitigations.