The Inactive Logout plugin for WordPress suffers from a stored XSS vulnerability due to improper neutralization of input in the 'ina_redirect_page_individual_user' parameter. Authenticated users with subscriber or higher privileges can inject arbitrary JavaScript that executes in the context of other users viewing the injected page. This vulnerability affects all versions up to and including 3.5.5. The CVSS 3.1 vector indicates network attack vector, low attack complexity, privileges required, no user interaction, and impacts confidentiality and integrity with no impact on availability.

Successful exploitation allows an authenticated attacker to execute arbitrary scripts in the browsers of users who visit the injected page. This can lead to theft of sensitive information, session hijacking, or other malicious actions affecting confidentiality and integrity. Availability is not impacted. The vulnerability requires authenticated access at subscriber level or above, limiting exposure to logged-in users.

No official patch or remediation has been documented yet. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict plugin usage to trusted users only and consider disabling or removing the Inactive Logout plugin if possible to prevent exploitation.